Will both types of calculators have "C Hewlett Packard Company 1987"? The C has a circle around it. I was trying to check the back of the calculators on eBay, to confirm the build date, and all seem to have the 1987 date on their picture descriptions. Maybe I'm looking at that wrong. Thank you for your video on the different displays.
The copyright date is the same on both of mine. You need to look at the serial number which is just above the copyright. The first 2 digits of the serial number (just above RD in PACKARD on mine) is the years since 1960. Mine show 29 and 33 for 1989 and 1993 respectively.
Will both types of calculators have "C Hewlett Packard Company 1987"? The C has a circle around it. I was trying to check the back of the calculators on eBay, to confirm the build date, and all seem to have the 1987 date on their picture descriptions. Maybe I'm looking at that wrong. Thank you for your video on the different displays.
The copyright date is the same on both of mine. You need to look at the serial number which is just above the copyright. The first 2 digits of the serial number (just above RD in PACKARD on mine) is the years since 1960. Mine show 29 and 33 for 1989 and 1993 respectively.