Really interesting! I just did a similar test, but with a much smaller sample size, I took 8 quartz watches from different manufacturers and different quartz movements to see how they compared over the month. Your results are probably a lot more scientific than mine. But amazingly I had one watch running a Seiko mecha-quartz VK63 that ran an astounding 0.5 seconds off over the course of the month.
Just the Watch this result dovetails with my suspicion exactly. I just purchased a SEIKO chronograph and was stunned at its accuracy despite not having any gps correction. In the service bulletin printed for technicians, it actually states that the 8t63 movement it more accurate than previous versions, astonishing.
I brought a used mossimo watch from ebay more that 10 years ago I changed the battery about a year ago it is still spot on to the second this is not an endorsement of the brand . just fortunate to get the rare one that is so accurate
18:32 was one of the finest moments in UA-cam history! As an aside, my £9 Casio F91W drifts by about 4s a month, whereas my £7,000 Rolex is +2s a DAY. Naturally, my Casios get lots of wrist-time :) Keep up the good work.
I remember, in the late 1980s, when I went to large meetings in college (like, at the school's basketball arena) I would start hearing other guys' watches starting to randomly "beep" a couple of minutes before the "top of the hour" all around the room. I daydreamed that if I were ever a speaker at one of those meetings I would take a minute and ask everyone to synchronize their watches (based on a time reference which I would announce) and then I'd hear one, epic, synchronized "beep" in that arena. Of course, I never spoke at one of those big meetings. So the best I can do now is have 57 watches beep together at the 18:32 mark in this video. I'm glad it found its way to someone who could appreciate the achievement!
Greg Anderson - Elmer the Clep Excellent - I cant imagine living life so sloppily as to not have your watch tell the correct time. Any more than a second or so out and I’m NOT happy. MultiBand6 keeps me sane :)
Greg Anderson should get more video promotion from youtube. This guy's videos are just excellent on a different level than most popular watch youtubers who may have flashier videos, but who clearly don't know nearly as much as Greg Anderson, and do not sound as interesting when you hear them speak.
What's not well known is that you can consistently have very accurate time, regardless of the precision of the oscillator, if your quartz analog or digital watch has a "trimmer condenser". They're generally found in older, vintage watches - even many of the cheaper ones. A trimmer condenser changes the frequency coming from the quartz crystal oscillator when its capacity is changed. The frequency is fine-tuned to provide 1 Hz, or one second per second, in frequency dividers in a quartz analog watch. The same principle is involved with an LCD (liquid crystal diode) digital watch. The trimmer condenser looks like a little screw that’s been wired into the circuit board. Typically, turning the screw clockwise speeds it up, and counterclockwise slows it down at roughly about 1 second per day per 1/6 turn of the screw. You should be able to get accuracy to within a couple of seconds per month. What I first like to do is compare the time with another watch, that I know runs a bit fast or slow, then fine-tune the trimmer condenser from there. Then I re-fine-tune the time to an accurate Internet site that shows the time. Keep in mind that, after several years, you may have to tweak the trimmer if the accuracy shifts a bit; but the effects due to aging components is usually negligible. Anyway, when buying a watch, it’s a good idea to remember that not many newer watches have them - even the expensive ones.
I found the higher end watches of Casio, Seiko, Citizen, and Timex are keeping within 2 to 8 seconds average. There are chronometer rated quartz watches that are calibrated to be within 2 to 3 seconds per month. These are costly. The Casio watch I am wearing now is the GWG-2000. It is keeping to about +3 to +4 seconds per month. The newer quartz watches are computer calibrated during the manufacturing process, and the corrections are programmed in. The higher end of the older quartz watches have a trimmer capacitor in the oscillator section that can be adjusted. You would need a precision frequency counter with a proximity probe. There are dedicated calibrators for quartz calibrators for this type of adjustment. Got to admit... These quartz watches are a terrific deal. Very low cost for excellent accuracy. Very dependable over many years. Simply change a low cost battery when it goes weak. On the other hand a decent mechanical watch like an Omega, or a Rolex, or a Hamilton, or an Eterna, can cost many thousands of dollars and keep about 4 to 8 seconds per day average at its best. Then there are the expensive cleanings and maintenance every 4 to 5 years.
I was watching the Good Timekeeper Show with Greg Anderson and was synching my Casio watch with the Junghans App at the same time. To my complete surprise it didn't work. But when I stopped the video and silenced my host, Greg Anderson, my Casio synchronized perfectly. It turns out I can't watch my favourite watch channel and synchronize my watch at the same time. Such is life and Greg's voice interfers with the signal. It's a great channel and I have become a big fan. The Gshocks are great. I have two, the GAW 100 as a beater (it's an amazing watch, big but so easy to read) and the GWT b200 for a more stylish look ( nice seconds hand). I am considering the GW 7900 as it looks so cool. My first GShock was a GW M5610-1B which was fine but I could hardly read the negative display and I had to give it to my son. Now I only consider the positive display because I am too old for the stealth look. I live in the South of Spain, great for Tough Solar, but the radio reception isn't good. If I leave the watch in the patio overnight there's no problem but in the house it's dodgey. I am enjoying the Junghans app you recommended because it works and it's so interesting how it functions. I am left-handed so I bump into everything and I never take my watch off all day, swim, shower or work. As such the Gshocks are perfect for me, being so tough and weightless. I am surprised Casio hasn't come up with radio reception app for their customers in the Southern hemisphere, I have family in Australia (the Irish emigrate everywhere). Anyway, thanks for the channel and I'd recommend Gshock watches for anyone.
I thought I was losing a lot with my watch so I started looking up videos. Thank God I lost 12 seconds over the past six months. It makes me feel a lot better when I see 15 seconds in a month is normal.
Great video !!! I think it’s pretty funny that the AE1200 (James Bond) look alike kept the closest time sync and it was the least expensive. Thanks again for a fun and interesting watch review video 😎👍
Hallo Greg, I'am very glad to see that there is someone else out there, even more obsessed with accuracy than I am! Just loved this video. I have two multiband Casio's myself and 12 other watches, mechanical and quartz. Thanks for shearing this great experiment with us. Greatings from the Netherlands in Europe.
Thank you for watching. I've found that watch fans who comment on my timekeeping videos are very kind to me. And isn't it great that there are more and more ways to keep accurate time these days? I remember (20 years ago) when things like cell phone networks weren't quite right but, now, even those are really good... which is nice because so many folks are using their cell phones as their primary devices for keeping time.
Ok, this is NOT a quartz watch accuracy video. It's a Cheap Quartz Watch Accuracy video and an excellent Old Cheap Quartz Watch Accuracy video. I would have liked to see a big chart of the results overlaid next to you as you talked over it. Your 30 year old quartz watches were more accurate than just about any certified COSC mechanical movement in a watch under $10,000. I would like to see you show results for the $400-$500 Seiko & Citizen range of watches, they claim 15seconds too. Gave you a thumbs up.
That was very entertaining, specially the chimes as I too have all my watches set to hourly chimes and it always makes me smile when I hear them beep. 😍
I actually did the same, but only on one watch. It lost 14 seconds in a month which is not bad at all. That's roughly 3 minutes in a year. However temperature is also a factor (and it's cold here in Denmark). Luckily my watch is a radio controlled watch, so it'll always be accurate down to the second. I swear, my OCD is creeping up when my watch did not receive a signal one night haha. Gotta love Casio watches, you get so much for so little compared to other watches. Edit: Spelling. OH! Another great video again, love your videos good sir.
I didn't say it in the video but it was a bit of mild torture to know that my 57 watches were all wrong for a whole month! Luckily, I had plenty of "atomic" clocks all around the house.
*_Same here man. Sometimes you can do all that you know how to but I believe YAH’s heavenly host & even the weather serve as impediments to signal reception._* *_A couple of months ago a few of my Wave Ceptor/Atomics failed to receive during a full moon 🌕 & I believe the day after also._*
Thank you for doing these videos. I really like them. You also got me into watches beyond belief, and now I have my own collection. Keep being you and thank you again.
You're welcomed. I was fortunate enough to find an audience of folks who enjoy this stuff AND the comments are so kind too! I apologize if I've influenced you to burst your budget on watches! But aren't they fun?
I’m glad to be back. I’ve had a very demanding but also rewarding “regular job” this summer and now I have a handful of unfinished UA-cam videos that I need to finish ASAP!
I wonder if the accuracy of the watch affects the accuracy of the timer and stopwatch. Do different watches differ in the accuracy of the timer and stopwatch, not even considering the accuracy of the watch.
Thank you. I normally don't ask people to like my videos or to become subscribers. But my viewers have been very, very good to me anyway. And this summer the view numbers have really, really gone up (ironically, during a time when I didn't produce a lot of new UA-cam material)!
Very cool experiment. I'm very impressed with the accuracy of the Casio Royale. I've been thinking about getting one. Next time I go to Walmart I hope they have a sale and I'll pick one up.
I really enjoyed this video. I have been noticing that many of my Casios were off from each other. I laughed so much with the last segment with they hourly beeps. I have a new 2100 Casioak coming. Will do a time accuracy test to see how close it will be to my atomic square G-Shock
Thank you for the detailed breakdown of a great topic. Recently I checked my new Casio G‑Shock GW‑M5610U for accuracy. And on the one hand I was pleasantly surprised and on the other hand disappointed. I was pleasantly surprised because in thirty days this watch showed a discrepancy of 2.2 seconds. A very good result. So why was I disappointed as well? Because it wasn't +2.2 seconds, but −2.2 seconds! This is my first G‑Shock I've ever owned that doesn't rush, but lags. And I hate watches that lag. I would rather have a less accurate watch that rushes than a more accurate watch that lags. Psychologically, I am not comfortable with watches that lag simply because with a watch that rushes, I will never be late for anything. And it would be okay if my region had good Multiband 6 reception, but here these radio signals are not caught. In addition, I work at sea, contracts reach 7‑8 months, and there is rarely access to the Internet, so even in this case I can not always check and adjust the accuracy of the time. I tested the watch using the Time.is website (it has handy options, including sounding the seconds, which makes it easier to get an accurate check). The watch had been sitting on a shelf all this time without being worn. They say that cooler temperatures and movement can make a quartz watch go a little faster. I hope this is true. Time will tell.
I only have one quartz watch which runs slow so, like you, I was surprised that it didn’t run fast like the others. I suppose you could check it against GPS clocks while you’re at sea. (I’m guessing you use GPS for navigation.) Hmmm.
I find it necessary to update my post about the accuracy of my GW-M5610U. It's something of a miracle... But in the period of repeated observation somewhere from April to today (end of June) the watch showed much better accuracy. Moreover, hallelujah, it is not lagging, but running ahead by a tiny fraction of a second (not more than a quarter) in a full month of 31 days. Satisfied!
@@Oleg__ Hello friend. In my experience that movement simply wouldn't drift like that all by itself. Have you checked whether the watch is picking up the signal intermitently? Press button D to check last signal date..
Last year at this time the rumor spread that "time was running out" for the WWV and WWVB radio station and they would be off-the-air at the end of 2018. But there was never an official announcement about it from NIST. I was so busy that I never got around to investigating the rumor very much. I was just happy that, in the end, it was only a rumor. Still, at the start of January, I was anxiously looking at my dozens of watches and dozens of clocks, wondering what would happen. So far so good. But I'm still thinking about buying that iPhone app which is supposed to mimic WWVB in a way that will allow our radio controlled watches and clocks to set themselves even when WWVB isn't available. If I do I'll make a video about it, of course!
@@GoodTimekeeper - Hi mate, great vid btw! If WWV had shut down, could you have boosted your reception to pickup Japan or Europe? It's possible to boost the signal here in Europe if you're outside UK or German transmitter range, for instance Majorca. You attach or rest the metal caseback of the watch to a large-ish metal object like a bicylce or radiator and bingo it works. Big difference in distance mind you in USA. Poss using TV aerial and co-ax plug maybe?
Great video - I love when you buy a cheap casio watch and it ends up being super accurate. I bought the re-issue DW-5900 when it came out (I want to say November of 2018) and that watch has been accurate to the second for several months! the beauty you can crack them open and regulate them via trimmer screw if they are off by too much!
So far I haven't been brave enough to open up these watches and try any custom modifications or "tweaking" myself. I admire people who understand the nitty-gritty details better than I do. Maybe I'll try it too someday. Meanwhile, I appreciate your reports.
@@GoodTimekeeper You shouldn't be since they are super simple. Maybe one day buy another one on sale at Walmart and use it to practice. I remember the first few times I took a module completely apart just to reassemble it and be left with one or two miniature springs - now I know to keep an eye open for them, but to adjust the timekeeping you don't even need to go that far - all you need to do is take the caseback and rubber caseback cushion off. Keep the great videos coming.
Thanks for this video. My old Dad's watch from 1989/1990? is running slow... about 1.4 seconds slow per day. That is about 42 seconds a month. (it's a Casio AD-510) I have to say that if a watch lacks accuracy, it should best run fast and not slow. Now I wonder, should it make a difference if I replace the quartz crystal?
i usually set my watches a minute or even two minutes fast and dont worry about nutz on accuracy . my parents who never had expensive watches in the 50's and 60's , set their watches 10 minutes ahead and im sure they did just fine , getting to appointments ect .
That is, do I understand correctly that at lower temperatures, watches will run faster? Are there other factors involved? For example, a watch at rest (lying on a shelf), or used in motion on a hand.
Nice presentation. On the subject of Casio G-Shock, I have a GA2000 which gains 5 seconds per month in its tin. On the wrist it actually loses 2 seconds per month. My most accurate watch is a Citizen Promaster Diver eco drive BN0085-01E. On wrist + 0.5 and off wrist + 1.5 seconds per month. I like my watches to be as accurate as possible,but honestly anything better than 10 seconds per month is adequate for me to let it ride for 6 months - at which point they all get reset.
Wearing a watch can improve the accuracy as when the watch is strapped to your wrist, body heat tends to keep it at a very constant temperature. This applies to mechanical watches as well as the quartz variety.
I recently picked up a G-shock GW6900-1. The Multi Band 6 had last been able to update four months before I received the watch. In those four months, it only gained eleven seconds. That's less than a tenth of a second a day. I'm happy with it.
Really good job! The most exact quartz watch is "The Citizen" by Citizen, could be inexact by 1-5 seconds per year. The second best will be a Seiko, the "Grand Seiko" , about 10 seconds a year. No other brand can match them. Third best should be a Bulova.
Fascinating to see. I've always suspected that manufacturers would test their crystals before they assemble the watches and have a sorted pile going to different "grades" of watches, so it's fun to see that isn't necessarily the case.
It is really quite amazing that a cheap digital wrist watch can keep time within +/- 15 to 30 seconds a month. That is a level of accuracy of 5.78 - 11.57 ppm ( 1x10^-6) per day. I think the more expensive G-Shock watches are around +/- 7.00 seconds a month ( 2.7 ppm per day).
Thanks for the review. Accuracy is the most important feature of a watch. Ideally the error should be less than 10s per year so you only adjust it only when you swap the battery.
I would be very interested to see you do a video on that watch you have on your wrist in this video. GW B5600 I think it is. Glad to see more videos from you
Crystal oscillators are temperature-sensitive - the on-wrist temperature is at least 10 degrees C higher than storage temperature which you should take into account when discussing accuracy.
Very instructing, thanks, I'm looking forward to an accuracy comparison test on Casio F91w, A168, A700 and the newer A1000 which apparently has the same 3472 module as the A700, thanks and kee up the good work.
Ash Willis I just got that new watch last week. I can’t wait to do a proper video review, but I may have to wait until next week. Sometimes it takes a while to be as in-depth as I usually am, and with the addition of an iOS app to include in the review... well... it might take all day to shoot and edit that one!
That's why I love my GW-B5600AR-1 having the BT connection keeps it accurate to the second every day! I couldn't use a regular quartz after having one off these..
Japanese quartz > Swiss quartz > Chinese quartz *Now that's an oversimplification. One exception is my Certina Precidrive, which is Swiss and the most accurate movement I've owned. But in general the above ranking is what my own and a couple of others anecdotal "evidence" would suggest.
I too use the Emerald Sequoia Time app to set my watches and to verify their accuracy. Utilizing the tenth second display option is handy when checking Bulova Precisionists. The audio signal is really nice when I don’t want to fool with a camera. I have several of the same Casios as you do, so I found this video very interesting. Since the AE-1000 and the more expensive AE-2100 use the 3198 module, I swapped the modules between a within spec, but disappointing AE-2100 with a near perfect AE-1000. I will give away the AE-1000 to someone that doesn’t mind it being a little off. Heck, it is still more accurate than a Rolex.
I think I need to do a little bit of a "Time App Roundup" some time. But the Emerald Sequoia app is so simple and works so well that I haven't really tried out many of the others. And it's free!
ElmertheClep I also recommend the other Emerald Sequoia apps: Emerald Observatory for iPad, Emerald Chronometer HD (for iPad), Emerald Chronometer (for iPhone), Emerald Timestamp and Emerald Geneva (free version of one of the 16 watches included in the Emerald Chronmeter apps).
My orange band casio is also my most accurate ...followed by my timex expedition(t49905)...both I got on clearance ...now I want to repeat your test by disabling my radio watches receive function ...I thought I might be crazy until I found this video...all my alarms go off at 4:20pm
ryan johnson That new watch review is a high priority but it might be a few days before I can put together one of my epic, in-depth reviews. Stay tuned.
I've read that the highest accuracy is achieved if you wear them for around 8 hours a day (otherwise: room temperature). I didn't make exact tests but I think my F91W is in the 5s/month range when worn daily but 20s plus when not.
eeyyaakk When I posted the “teaser” for that I didn’t realize that my “real job” schedule was going to be so busy. But now things are settling down and I have a bunch of UA-cam projects that I need to finish, including that one!
I have an Orient and a Pagani Design that both use a Seiko VK63 mecaquartz movement. I've had the Pagani Design since September and it hasn't even lost a second yet. I haven't worn the Orient in a while but it had similar performance.
That's a fine-looking watch! I found a review where a guy says his gained only 5 seconds in a month (as opposed to Casio's claim that it'll be accurate to within 30 seconds). So, an excellent value! divewatchesblog.com/reviews/casio-mdv106-1a-review/
I had a Citizen Eco-Drive, basic entry 3 hands and date, it had green decorations (dial, band stitches) on black PVD case, and it was accurate to well under +1 sec per month, so in two months it was barely over +1 sec. I traded it for a mechanical 😀😀😀😀
Most of my casios are around +13s/month. The exceptions were an old EFR-106 (+3.5s) and a new EFR-539 (under 1s/month). Orient Start was +65s, but thats pretty good for automatic watch at its price. So the worst was MTP-1384 with +20s.
No guarantees. But I'll bet it's still notably better than the 20 seconds Casio claims. Of course, I normally keep the automatic atomic time reception turned on. So it'll never really be noticeably wrong.
@@GoodTimekeeper even if not it still seems to do pretty well. Gets great reception too. Where my g shock does not. But I also live In the Pacific NW where I am surrounded by mountains and rain clouds.
@@GoodTimekeeper On the waveveptor it is very easy to find out exactly when the last time it synced even if that time was weeks ago. is there any way to do this with the g shock?
@@JustinWillisDevil240Z I'm about 2.5hrs north of Seattle. Interestingly enough, it's my G-Shock that reliably gets reception where my Waveceptor does not. I usually have to put the Waveceptor in a window to let it get the signal.
Hi there! I can’t remember where I read it, but I vaguely remember reading that the quartz crystal is affected by temperature, and watch manufacturers aim to ‘tune’ their timekeeping for optimum timekeeping at 30 degrees Celsius (I’m assuming body-temperature less thermal losses for air, clothing, etc...)
Am I correct in assuming that at lower temperatures, watches will run faster? Are there other factors involved? For example, is the watch at rest (lying on a shelf), or is it used in motion on the hand.
@@Oleg__ Possibly but not necessarily. Quartz frequency over temperature is not a straight line. So you could see it getting faster as temps drop up to a point where it flips and starts getting slower again. Of course really high end ones include temperature compensation. Movement shouldn't effect a quartz movement at all. I mean maybe if you set the watch on a strong signal generator at the same frequency as the quartz but out of phase. The difference between worn and on a shelf would be a temperature difference. Body temp is usually higher than room temp.
My Casio EFA110D about 22 years old are within 2sec/month in the LCD part, but those analog hands are usually around a minute off after 2-3 months which is strange :) Recently added two EFA125D are very similar, the spread between them about 1sec after month. To make the test more accurate, you also should put fresh battery to all those watches. Just for comparison my Seiko5 automatic from eighties are about 15sec/day..
They don't use natural quartz in modern crystal oscillators. It's too impure. They grow synthetic quartz for this purpose. You have a very nice collection of Casios. I've owned a few of those models in the past. I love how watches can remind us of our past.
If a watch was fast when it was new then degraded over time to within a second a month after ten years, could that be a variable that you didn’t take into consideration? We’re all your watches except for the really old ones fairly new? How many were bought new the same day to be tested? What was the average time off for all the watches tested?
Really interesting! I just did a similar test, but with a much smaller sample size, I took 8 quartz watches from different manufacturers and different quartz movements to see how they compared over the month. Your results are probably a lot more scientific than mine. But amazingly I had one watch running a Seiko mecha-quartz VK63 that ran an astounding 0.5 seconds off over the course of the month.
Just the Watch this result dovetails with my suspicion exactly. I just purchased a SEIKO chronograph and was stunned at its accuracy despite not having any gps correction. In the service bulletin printed for technicians, it actually states that the 8t63 movement it more accurate than previous versions, astonishing.
Both vk and vh series from Seiko (sweep second and chronograph movements) are super duper accurate!
Id like to see that test again but all new battery's and either in a constant temp room!
Those Seiko MecaQuartz movements are known to be super accurate and a great value for the money/watch, if you're looking for accuracy, look for those.
I brought a used mossimo watch from ebay more that 10 years ago I changed the battery about a year ago it is still spot on to the second this is not an endorsement of the brand . just fortunate to get the rare one that is so accurate
18:32 was one of the finest moments in UA-cam history! As an aside, my £9 Casio F91W drifts by about 4s a month, whereas my £7,000 Rolex is +2s a DAY. Naturally, my Casios get lots of wrist-time :) Keep up the good work.
I'm impressed that you are enjoying such opposite ends of the price spectrum!
I remember, in the late 1980s, when I went to large meetings in college (like, at the school's basketball arena) I would start hearing other guys' watches starting to randomly "beep" a couple of minutes before the "top of the hour" all around the room. I daydreamed that if I were ever a speaker at one of those meetings I would take a minute and ask everyone to synchronize their watches (based on a time reference which I would announce) and then I'd hear one, epic, synchronized "beep" in that arena. Of course, I never spoke at one of those big meetings. So the best I can do now is have 57 watches beep together at the 18:32 mark in this video. I'm glad it found its way to someone who could appreciate the achievement!
Greg Anderson - Elmer the Clep Excellent - I cant imagine living life so sloppily as to not have your watch tell the correct time. Any more than a second or so out and I’m NOT happy. MultiBand6 keeps me sane :)
@@GoodTimekeeper In the late 70s/ early 80s our teachers were driven crazy by beeping Casios in class. 😅
It's actually 18:30
I really enjoyed your show. I particularly enjoyed the chimes at the end.
Greg Anderson should get more video promotion from youtube. This guy's videos are just excellent on a different level than most popular watch youtubers who may have flashier videos, but who clearly don't know nearly as much as Greg Anderson, and do not sound as interesting when you hear them speak.
What's not well known is that you can consistently have very accurate time, regardless of the precision of the oscillator, if your quartz analog or digital watch has a "trimmer condenser". They're generally found in older, vintage watches - even many of the cheaper ones. A trimmer condenser changes the frequency coming from the quartz crystal oscillator when its capacity is changed. The frequency is fine-tuned to provide 1 Hz, or one second per second, in frequency dividers in a quartz analog watch. The same principle is involved with an LCD (liquid crystal diode) digital watch. The trimmer condenser looks like a little screw that’s been wired into the circuit board. Typically, turning the screw clockwise speeds it up, and counterclockwise slows it down at roughly about 1 second per day per 1/6 turn of the screw. You should be able to get accuracy to within a couple of seconds per month. What I first like to do is compare the time with another watch, that I know runs a bit fast or slow, then fine-tune the trimmer condenser from there. Then I re-fine-tune the time to an accurate Internet site that shows the time. Keep in mind that, after several years, you may have to tweak the trimmer if the accuracy shifts a bit; but the effects due to aging components is usually negligible. Anyway, when buying a watch, it’s a good idea to remember that not many newer watches have them - even the expensive ones.
Too long didn't read
Thanks . I actually found a trimmer inside the Casio king watch which gained 1 sec/day . I am adjusting it to see how it behaves.
The Apple Watch is super accurate too, it’s dead on for the first two days and then it’s dead and inaccurate by 28 days
💀💀💀💀
@Darwin Dustin BOT LOL
It's right for two days but after that it's not even right twice a day.
The Apple watch gets time correction at least once a day. It is not a watch, it is computer
I found the higher end watches of Casio, Seiko, Citizen, and Timex are keeping within 2 to 8 seconds average. There are chronometer rated quartz watches that are calibrated to be within 2 to 3 seconds per month. These are costly. The Casio watch I am wearing now is the GWG-2000. It is keeping to about +3 to +4 seconds per month.
The newer quartz watches are computer calibrated during the manufacturing process, and the corrections are programmed in. The higher end of the older quartz watches have a trimmer capacitor in the oscillator section that can be adjusted. You would need a precision frequency counter with a proximity probe. There are dedicated calibrators for quartz calibrators for this type of adjustment.
Got to admit... These quartz watches are a terrific deal. Very low cost for excellent accuracy. Very dependable over many years. Simply change a low cost battery when it goes weak. On the other hand a decent mechanical watch like an Omega, or a Rolex, or a Hamilton, or an Eterna, can cost many thousands of dollars and keep about 4 to 8 seconds per day average at its best. Then there are the expensive cleanings and maintenance every 4 to 5 years.
I was watching the Good Timekeeper Show with Greg Anderson and was synching my Casio watch with the Junghans App at the same time. To my complete surprise it didn't work. But when I stopped the video and silenced my host, Greg Anderson, my Casio synchronized perfectly.
It turns out I can't watch my favourite watch channel and synchronize my watch at the same time. Such is life and Greg's voice interfers with the signal.
It's a great channel and I have become a big fan. The Gshocks are great. I have two, the GAW 100 as a beater (it's an amazing watch, big but so easy to read) and the GWT b200 for a more stylish look ( nice seconds hand). I am considering the GW 7900 as it looks so cool.
My first GShock was a GW M5610-1B which was fine but I could hardly read the negative display and I had to give it to my son. Now I only consider the positive display because I am too old for the stealth look.
I live in the South of Spain, great for Tough Solar, but the radio reception isn't good. If I leave the watch in the patio overnight there's no problem but in the house it's dodgey.
I am enjoying the Junghans app you recommended because it works and it's so interesting how it functions.
I am left-handed so I bump into everything and I never take my watch off all day, swim, shower or work. As such the Gshocks are perfect for me, being so tough and weightless.
I am surprised Casio hasn't come up with radio reception app for their customers in the Southern hemisphere, I have family in Australia (the Irish emigrate everywhere).
Anyway, thanks for the channel and I'd recommend Gshock watches for anyone.
I thought I was losing a lot with my watch so I started looking up videos. Thank God I lost 12 seconds over the past six months. It makes me feel a lot better when I see 15 seconds in a month is normal.
Great video !!! I think it’s pretty funny that the AE1200 (James Bond) look alike kept the closest time sync and it was the least expensive. Thanks again for a fun and interesting watch review video 😎👍
Hallo Greg,
I'am very glad to see that there is someone else out there, even more obsessed with accuracy than I am! Just loved this video. I have two multiband Casio's myself and 12 other watches, mechanical and quartz. Thanks for shearing this great experiment with us. Greatings from the Netherlands in Europe.
Thank you for watching. I've found that watch fans who comment on my timekeeping videos are very kind to me. And isn't it great that there are more and more ways to keep accurate time these days? I remember (20 years ago) when things like cell phone networks weren't quite right but, now, even those are really good... which is nice because so many folks are using their cell phones as their primary devices for keeping time.
Ok, this is NOT a quartz watch accuracy video. It's a Cheap Quartz Watch Accuracy video and an excellent Old Cheap Quartz Watch Accuracy video. I would have liked to see a big chart of the results overlaid next to you as you talked over it. Your 30 year old quartz watches were more accurate than just about any certified COSC mechanical movement in a watch under $10,000. I would like to see you show results for the $400-$500 Seiko & Citizen range of watches, they claim 15seconds too. Gave you a thumbs up.
Is it not just exemplary quality to see that those 30 year old Casio's are still functioning that well? Wow
Very nice Mr. Anderson... Amazing information shared on quartz accuracy.... Nice to see u rocking the new square😊
That was very entertaining, specially the chimes as I too have all my watches set to hourly chimes and it always makes me smile when I hear them beep. 😍
I actually did the same, but only on one watch. It lost 14 seconds in a month which is not bad at all. That's roughly 3 minutes in a year. However temperature is also a factor (and it's cold here in Denmark). Luckily my watch is a radio controlled watch, so it'll always be accurate down to the second. I swear, my OCD is creeping up when my watch did not receive a signal one night haha. Gotta love Casio watches, you get so much for so little compared to other watches.
Edit: Spelling.
OH! Another great video again, love your videos good sir.
I didn't say it in the video but it was a bit of mild torture to know that my 57 watches were all wrong for a whole month! Luckily, I had plenty of "atomic" clocks all around the house.
*_Same here man. Sometimes you can do all that you know how to but I believe YAH’s heavenly host & even the weather serve as impediments to signal reception._*
*_A couple of months ago a few of my Wave Ceptor/Atomics failed to receive during a full moon 🌕 & I believe the day after also._*
@@GoodTimekeeper they were in +
The chiming of all those watches reminds me of that scene of the 1960 The Time Machine movie.
Thank you for doing these videos. I really like them. You also got me into watches beyond belief, and now I have my own collection. Keep being you and thank you again.
You're welcomed. I was fortunate enough to find an audience of folks who enjoy this stuff AND the comments are so kind too! I apologize if I've influenced you to burst your budget on watches! But aren't they fun?
Casio Royal supremacy! 1&1/6 of a second, now that is impressive.
How do you measure 1/6 of a second?
@@entertainme7523 Camera frames. At 60 fps, that's 10 frames. 30fps 5 frames. 24fps 4 frames.
Outstanding vid as always and its nice to see you back. Really look forward to your vids 😊
I’m glad to be back. I’ve had a very demanding but also rewarding “regular job” this summer and now I have a handful of unfinished UA-cam videos that I need to finish ASAP!
I wonder if the accuracy of the watch affects the accuracy of the timer and stopwatch. Do different watches differ in the accuracy of the timer and stopwatch, not even considering the accuracy of the watch.
I absolutely love this. Thanks so much for uploading.. Look forward to the rest of your UA-cam catalogue!!
More to come. Thanks for watching!
Excuse me Greg, can you please tell me where you got those great watch boxes? Those look really nice. Thanks!
Hearing them happily chirping together was really cute, nice video! No dislikes? Must be a youtube bug, I've never seen that before.
I have that AE-1000W one & that one is the most accurate of all my watches. Actually love to hear the chimes when all the watches are not in sync.
I was searching this kind of videos for ages... Thanks🙂
big thumbs up for the hourly chime at the end...because i really wonderd during the video how that would sound.
Excellent Channel Greg,keep it up,fascinating stuff.
Thank you. I have a handful of video ideas which are almost ready to produce... so I hope I can keep it up!
Welcome back. I really enjoy your videos. More please!
Thank you. I normally don't ask people to like my videos or to become subscribers. But my viewers have been very, very good to me anyway. And this summer the view numbers have really, really gone up (ironically, during a time when I didn't produce a lot of new UA-cam material)!
Very cool experiment. I'm very impressed with the accuracy of the Casio Royale. I've been thinking about getting one. Next time I go to Walmart I hope they have a sale and I'll pick one up.
I really enjoyed this video. I have been noticing that many of my Casios were off from each other.
I laughed so much with the last segment with they hourly beeps.
I have a new 2100 Casioak coming. Will do a time accuracy test to see how close it will be to my atomic square G-Shock
thanks so much. watched it and gave it a thumbs up. you are the reason i bought the blue gw-m500f, and the agw- m100. great watches. love them
thanks, so cool. everyone thinks im wierd loving watches and clocks. it would be so easy to shop for me at christmas but they have no clue.
Thank you for the detailed breakdown of a great topic.
Recently I checked my new Casio G‑Shock GW‑M5610U for accuracy. And on the one hand I was pleasantly surprised and on the other hand disappointed. I was pleasantly surprised because in thirty days this watch showed a discrepancy of 2.2 seconds. A very good result. So why was I disappointed as well? Because it wasn't +2.2 seconds, but −2.2 seconds! This is my first G‑Shock I've ever owned that doesn't rush, but lags. And I hate watches that lag. I would rather have a less accurate watch that rushes than a more accurate watch that lags. Psychologically, I am not comfortable with watches that lag simply because with a watch that rushes, I will never be late for anything.
And it would be okay if my region had good Multiband 6 reception, but here these radio signals are not caught. In addition, I work at sea, contracts reach 7‑8 months, and there is rarely access to the Internet, so even in this case I can not always check and adjust the accuracy of the time.
I tested the watch using the Time.is website (it has handy options, including sounding the seconds, which makes it easier to get an accurate check). The watch had been sitting on a shelf all this time without being worn. They say that cooler temperatures and movement can make a quartz watch go a little faster. I hope this is true. Time will tell.
I only have one quartz watch which runs slow so, like you, I was surprised that it didn’t run fast like the others. I suppose you could check it against GPS clocks while you’re at sea. (I’m guessing you use GPS for navigation.) Hmmm.
@@GoodTimekeeper All these navigational benefits of high accuracy are for officers. :) I am not one of them. I'm a service personnel. )
Exactly my thoughts . I too hate a watch that lags .Get yourself that AE-1000W one & that one is the most accurate of all my watches.
I find it necessary to update my post about the accuracy of my GW-M5610U. It's something of a miracle... But in the period of repeated observation somewhere from April to today (end of June) the watch showed much better accuracy. Moreover, hallelujah, it is not lagging, but running ahead by a tiny fraction of a second (not more than a quarter) in a full month of 31 days. Satisfied!
@@Oleg__ Hello friend. In my experience that movement simply wouldn't drift like that all by itself. Have you checked whether the watch is picking up the signal intermitently? Press button D to check last signal date..
I wonder if there is an inherent difference in accuracy between analog and digital quartz watches.
None when it comes to "average market" watches. Higher end watches are more accurate on average but nowdays they are all analog.
I needed that video, thank you! Recently I bought a WV 59 and I like it a lot.
It’s good to see you back! Great video as usual. Any news about the USA powering-down their atomic-time transmitter?
It was decided to keep it operating.
Mark Mangus - that is excellent news.
Last year at this time the rumor spread that "time was running out" for the WWV and WWVB radio station and they would be off-the-air at the end of 2018. But there was never an official announcement about it from NIST. I was so busy that I never got around to investigating the rumor very much. I was just happy that, in the end, it was only a rumor. Still, at the start of January, I was anxiously looking at my dozens of watches and dozens of clocks, wondering what would happen. So far so good. But I'm still thinking about buying that iPhone app which is supposed to mimic WWVB in a way that will allow our radio controlled watches and clocks to set themselves even when WWVB isn't available. If I do I'll make a video about it, of course!
@@GoodTimekeeper - Hi mate, great vid btw! If WWV had shut down, could you have boosted your reception to pickup Japan or Europe? It's possible to boost the signal here in Europe if you're outside UK or German transmitter range, for instance Majorca. You attach or rest the metal caseback of the watch to a large-ish metal object like a bicylce or radiator and bingo it works. Big difference in distance mind you in USA. Poss using TV aerial and co-ax plug maybe?
Great video - I love when you buy a cheap casio watch and it ends up being super accurate. I bought the re-issue DW-5900 when it came out (I want to say November of 2018) and that watch has been accurate to the second for several months! the beauty you can crack them open and regulate them via trimmer screw if they are off by too much!
So far I haven't been brave enough to open up these watches and try any custom modifications or "tweaking" myself. I admire people who understand the nitty-gritty details better than I do. Maybe I'll try it too someday. Meanwhile, I appreciate your reports.
@@GoodTimekeeper You shouldn't be since they are super simple. Maybe one day buy another one on sale at Walmart and use it to practice. I remember the first few times I took a module completely apart just to reassemble it and be left with one or two miniature springs - now I know to keep an eye open for them, but to adjust the timekeeping you don't even need to go that far - all you need to do is take the caseback and rubber caseback cushion off. Keep the great videos coming.
Thanks for this video.
My old Dad's watch from 1989/1990? is running slow... about 1.4 seconds slow per day. That is about 42 seconds a month. (it's a Casio AD-510)
I have to say that if a watch lacks accuracy, it should best run fast and not slow.
Now I wonder, should it make a difference if I replace the quartz crystal?
i usually set my watches a minute or even two minutes fast and dont worry about nutz on accuracy . my parents who never had expensive watches in the 50's and 60's , set their watches 10 minutes ahead and im sure they did just fine , getting to appointments ect .
Depends on temperature. My Mtg runs 1 sec fast during the 6 summer month and 10 sec fast during the 6 winter month.
That is, do I understand correctly that at lower temperatures, watches will run faster? Are there other factors involved? For example, a watch at rest (lying on a shelf), or used in motion on a hand.
Nice presentation.
On the subject of Casio G-Shock, I have a GA2000 which gains 5 seconds per month in its tin. On the wrist it actually loses 2 seconds per month.
My most accurate watch is a Citizen Promaster Diver eco drive BN0085-01E. On wrist + 0.5 and off wrist + 1.5 seconds per month.
I like my watches to be as accurate as possible,but honestly anything better than 10 seconds per month is adequate for me to let it ride for 6 months - at which point they all get reset.
That´s why quartz are undoubtly better watches than mechanical.
never cease to amaze us dear old Greg! Good on ya'!🙋
Good to see you back and posting content again.
Thank u LOVE UR SHOWS.
17:46 I think you just made a techno song😂
Wearing a watch can improve the accuracy as when the watch is strapped to your wrist, body heat tends to keep it at a very constant temperature. This applies to mechanical watches as well as the quartz variety.
WOW! That is a LOT of work. Thanks for the fun.
I recently picked up a G-shock GW6900-1.
The Multi Band 6 had last been able to update four months before I received the watch. In those four months, it only gained eleven seconds. That's less than a tenth of a second a day.
I'm happy with it.
Really good job!
The most exact quartz watch is "The Citizen" by Citizen, could be inexact by 1-5 seconds per year. The second best will be a Seiko, the "Grand Seiko" , about 10 seconds a year. No other brand can match them. Third best should be a Bulova.
Fascinating to see. I've always suspected that manufacturers would test their crystals before they assemble the watches and have a sorted pile going to different "grades" of watches, so it's fun to see that isn't necessarily the case.
It is really quite amazing that a cheap digital wrist watch can keep time within +/- 15 to 30 seconds a month. That is a level of accuracy of 5.78 - 11.57 ppm ( 1x10^-6) per day. I think the more expensive G-Shock watches are around +/- 7.00 seconds a month ( 2.7 ppm per day).
Thanks for the review. Accuracy is the most important feature of a watch. Ideally the error should be less than 10s per year so you only adjust it only when you swap the battery.
The most accurate quartz watches precision comparison video ever!!
I would be very interested to see you do a video on that watch you have on your wrist in this video. GW B5600 I think it is. Glad to see more videos from you
Whoops, didn’t finish the video before commenting! Looking forward to that one
Yes, that’s my newest watch. I hope to do a video review in the next few days.
Crystal oscillators are temperature-sensitive - the on-wrist temperature is at least 10 degrees C higher than storage temperature which you should take into account when discussing accuracy.
This is my favorite form of autism
I obsessed over accurate time since I was a little kid as well. I differ only in that I haven't kept my watches over the years.
Your videos are great! I hope you get to share more videos!
I have a few more watch reviews that I need to produce and I'm excited to cover more about "The History of Timekeeping". So please stay tuned!
Very instructing, thanks, I'm looking forward to an accuracy comparison test on Casio F91w, A168, A700 and the newer A1000 which apparently has the same 3472 module as the A700, thanks and kee up the good work.
I ordered some two bucks fake F91w out of curiosity. After a few weeks, they've drifted several minutes...
LOVE this review
That was impressive. Thank you.
I like your stuff alot. I have the same g shock as the one you're wearing in the video.
Ash Willis I just got that new watch last week. I can’t wait to do a proper video review, but I may have to wait until next week. Sometimes it takes a while to be as in-depth as I usually am, and with the addition of an iOS app to include in the review... well... it might take all day to shoot and edit that one!
That's why I love my GW-B5600AR-1 having the BT connection keeps it accurate to the second every day! I couldn't use a regular quartz after having one off these..
Update! Im using a Citizen Eco-drive Promaster and love it!
Japanese quartz > Swiss quartz > Chinese quartz
*Now that's an oversimplification. One exception is my Certina Precidrive, which is Swiss and the most accurate movement I've owned. But in general the above ranking is what my own and a couple of others anecdotal "evidence" would suggest.
So your all watches go +30 sec / month, and only 1 was -12 sec. ?
It's a fun game to turn on the signal on several watches and hear them slowly drift apart over the days 😁
I too use the Emerald Sequoia Time app to set my watches and to verify their accuracy. Utilizing the tenth second display option is handy when checking Bulova Precisionists. The audio signal is really nice when I don’t want to fool with a camera. I have several of the same Casios as you do, so I found this video very interesting. Since the AE-1000 and the more expensive AE-2100 use the 3198 module, I swapped the modules between a within spec, but disappointing AE-2100 with a near perfect AE-1000. I will give away the AE-1000 to someone that doesn’t mind it being a little off. Heck, it is still more accurate than a Rolex.
I think I need to do a little bit of a "Time App Roundup" some time. But the Emerald Sequoia app is so simple and works so well that I haven't really tried out many of the others. And it's free!
ElmertheClep I also recommend the other Emerald Sequoia apps: Emerald Observatory for iPad, Emerald Chronometer HD (for iPad), Emerald Chronometer (for iPhone), Emerald Timestamp and Emerald Geneva (free version of one of the 16 watches included in the Emerald Chronmeter apps).
My orange band casio is also my most accurate ...followed by my timex expedition(t49905)...both I got on clearance ...now I want to repeat your test by disabling my radio watches receive function ...I thought I might be crazy until I found this video...all my alarms go off at 4:20pm
Fascinating experiment! Really enjoyed this video.
Very interesting. Demonstrates that timekeeping accuracy and price are not necessarily related.
Why didn't you test the bulova ultra precisionist accutron watch with s 262 KHZ quartz oscillator?
Looking forward to see what you think of that new Bluetooth square
ryan johnson That new watch review is a high priority but it might be a few days before I can put together one of my epic, in-depth reviews. Stay tuned.
I've read that the highest accuracy is achieved if you wear them for around 8 hours a day (otherwise: room temperature). I didn't make exact tests but I think my F91W is in the 5s/month range when worn daily but 20s plus when not.
doubt it
dude, you may have forgotten about your atomic clock video part two! I've been waiting for months
eeyyaakk When I posted the “teaser” for that I didn’t realize that my “real job” schedule was going to be so busy. But now things are settling down and I have a bunch of UA-cam projects that I need to finish, including that one!
I have an Orient and a Pagani Design that both use a Seiko VK63 mecaquartz movement. I've had the Pagani Design since September and it hasn't even lost a second yet. I haven't worn the Orient in a while but it had similar performance.
This was really interesting thank you Greg
What model is the first watch your put your hands on in this video? (the orange strap one) Is it the MWD 100?
That is a version of the AE-1000 as seen in this video... ua-cam.com/video/w71-ecJ3nVk/v-deo.htmlsi=LsANdYoBvxHj8Aod
@@GoodTimekeeper Thank you!
my top quartz contenders now are my cwc sbs, casio mrw200h and alba aqpj402 wich are about 0.5 to 1 second a month depending on temperature variations
Greg it would be nice if you do a review and accuracy of a casio mdv 106 duro.
That's a fine-looking watch! I found a review where a guy says his gained only 5 seconds in a month (as opposed to Casio's claim that it'll be accurate to within 30 seconds). So, an excellent value! divewatchesblog.com/reviews/casio-mdv106-1a-review/
Great to hear you. Appreciate you for looking to be so perfect and error-free. Thank you.
I had a Citizen Eco-Drive, basic entry 3 hands and date, it had green decorations (dial, band stitches) on black PVD case, and it was accurate to well under +1 sec per month, so in two months it was barely over +1 sec. I traded it for a mechanical 😀😀😀😀
The best Watch channel on UA-cam 👍
Most of my casios are around +13s/month. The exceptions were an old EFR-106 (+3.5s) and a new EFR-539 (under 1s/month). Orient Start was +65s, but thats pretty good for automatic watch at its price. So the worst was MTP-1384 with +20s.
PS: My casio royal was +12s
wow, thank you Greg, good to know
I also have that waveceptor that was only off by 1.25 seconds. I wonder if mine is that accurate.
No guarantees. But I'll bet it's still notably better than the 20 seconds Casio claims. Of course, I normally keep the automatic atomic time reception turned on. So it'll never really be noticeably wrong.
@@GoodTimekeeper even if not it still seems to do pretty well. Gets great reception too. Where my g shock does not. But I also live In the Pacific NW where I am surrounded by mountains and rain clouds.
@@GoodTimekeeper On the waveveptor it is very easy to find out exactly when the last time it synced even if that time was weeks ago. is there any way to do this with the g shock?
@@JustinWillisDevil240Z I'm about 2.5hrs north of Seattle. Interestingly enough, it's my G-Shock that reliably gets reception where my Waveceptor does not. I usually have to put the Waveceptor in a window to let it get the signal.
@@JustinWillisDevil240Z Yes, my GW-M5610 square allows you to see it with a quick button press.
Impressive collection! ❤️
Interesting experiment! Enjoyed the video very much!
Sound scene is ❤
Thanks for the info. Great video.
Hi there!
I can’t remember where I read it, but I vaguely remember reading that the quartz crystal is affected by temperature, and watch manufacturers aim to ‘tune’ their timekeeping for optimum timekeeping at 30 degrees Celsius (I’m assuming body-temperature less thermal losses for air, clothing, etc...)
Am I correct in assuming that at lower temperatures, watches will run faster? Are there other factors involved? For example, is the watch at rest (lying on a shelf), or is it used in motion on the hand.
@@Oleg__ Possibly but not necessarily. Quartz frequency over temperature is not a straight line. So you could see it getting faster as temps drop up to a point where it flips and starts getting slower again. Of course really high end ones include temperature compensation.
Movement shouldn't effect a quartz movement at all. I mean maybe if you set the watch on a strong signal generator at the same frequency as the quartz but out of phase.
The difference between worn and on a shelf would be a temperature difference. Body temp is usually higher than room temp.
"Greg Anderson, which pill, stay in the matrix or see reality?"
"do you have atomic clocks in the real world?"
Casio Symphony..😄
You make something that could be boring and making it interesting. 👍
I admit I was worried while I was editing this one. "Will it really be interesting when it's finally done?" I'm glad you liked it.
My Casio EFA110D about 22 years old are within 2sec/month in the LCD part, but those analog hands are usually around a minute off after 2-3 months which is strange :)
Recently added two EFA125D are very similar, the spread between them about 1sec after month.
To make the test more accurate, you also should put fresh battery to all those watches.
Just for comparison my Seiko5 automatic from eighties are about 15sec/day..
recommended website for synching watches?
Interesting, and fun.
They don't use natural quartz in modern crystal oscillators. It's too impure. They grow synthetic quartz for this purpose.
You have a very nice collection of Casios. I've owned a few of those models in the past. I love how watches can remind us of our past.
If a watch was fast when it was new then degraded over time to within a second a month after ten years, could that be a variable that you didn’t take into consideration? We’re all your watches except for the really old ones fairly new? How many were bought new the same day to be tested? What was the average time off for all the watches tested?