Late Spitfire Fuse-Box Fuses (Revisited) (Err4.Apr24)

Late Spitfire Fuse-Box Fuses (Revisited)-Correcting the End of Episode 15/Errata 2
Small Triumph Sports Library & Archives, Errata 4 (April 2024)
This episode revisits my speculation about Triumph specifying a 10-amp fuse for the middle fuse-box circuit in a late (1978-79.5) Spitfire 1500 owner’s handbook. With the evidence I had on hand, I originally considered this a one-off error, but new evidence has sent me in a different direction.
Note: This video is a bit clunky and repetitive; if I had more time on my hands right now, I would tighten up my presentation. However, the content suffices, even if it requires a little more patience than usual.
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Initial notes/corrections, pedantic nonsense, and self-mockery:
6:30 I have operated under the assumption that this reprint, indicated to be the second edition of a 1978 handbook, is the second version of two 1978-model-year-designated handbooks that were used through early 1979. I have also assumed that these two editions were essentially the same with very minor differences. (One feature of the original handbooks in this period was clearly dated emissions control warranty pages that were updated from year to year.)
7:12 After doing a little additional digging, I came across a 1973 model-year handbook published in October 1972 that looks the same externally.
11:40 UPDATE (17 May 2024): I've subsequently acquired an October 1980 Lucas Service British Car Replacement Parts, 1977-1980 supplement to catalogue 220/1 that features the exact same fuse-box information as the 1983 supplement shown--including indicating the fuse box itself as only appropriate through 1979.
13:18 Note that 1973 and earlier Lucas Triumph Service and Specification catalogues also stubbornly refuse to associate specific fuses with the 8FJ fuse box.
21:03 If I’m reading it correctly, it’s important to note that this was a small run of 2,000, so possibly a late additional run of the first edition for the 1975 model year. The 1977 handbook published in December 1975 seems to have been a very large run of 10,000. For context, it is worth noting that Triumph’s best year in the United States in terms of volume of sales was 1976, when it moved over 28,000 cars (Cook 58). In the U.S., Triumph sold 8,857 Spitfires in 1975; 6,846 Spitfires in 1976; and 9,463 in 1977 (Cook 60).
24:35 There are at least two little oversights/mistakes in my approach to the chart. For one, I should have been clear that the reprint of the 1978-79.5 handbook is of a second edition of a part number with “/78” (indicating it was created for the 1978 model year). Also, for the 1977 model-year handbook, I have assumed the back-of-the-book specs are the same as the 1975 and 1978-79.5 versions on my shelf even though I don’t have direct access to that book and haven’t asked; I’m probably correct, but I really shouldn’t assume anything.
Works Cited
Cook, Michael. _The Triumph Spitfire_. TAB Books, 1981.