I have some 11630 Autavias on the list, with 375xxx serial numbers, and it is not surprising that this "batch" could have gone into the 376xxx range.

I also have a couple of 15640 Skippers in the 376xxx range . . . and these would have been from cases marked 11630. So m=no real surprise or concerns to see a 11630 in the Viceroy colors.

Jeff

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: Hope this helps - I had the same question a couple of years ago.

: In the forums and in my collection, 376xxx is seen on the very last
: 1980-81 11630 models (no record of a 377xxx case reference).

: A number of the 375xxx and 376xxx cases were in batches made by
: Heuer to order for the Argentine Air Force and Kenyan Air Force.
: Are there any caseback markings? Normally in this range the
: variants will be "viceroy' colour scheme or the gloss black
: dial / white hands unless you have the rarer KAF Arabic dial?