: Sorry to bring you this report, but I don't recognize any part
: of this watch as having been made by Heuer. I believe that it is
: a complete fake, in terms of Heuer pedigree.

: Of course, the parts may be worth something, but not as Heuer
: parts.

: Best,

: Jeff

: +++++++++++++++++++++++++++++++++++++++++

I think someone has modified a Nivada Grenchen Aviator Sea Diver to make this "Heuer". Take a look at this ebay link and you'll notice the Tachymeter edge of the dial is the same as your flea market find. It seems likely someone re-finished the dial to look like a Heuer. They also engraved the bridge and, inside of the case back with Ed Heuer. Too bad as the Sea Divers are actually pretty popular right now. Good that you have a working movement for parts, though.

https://www.ebay.com/itm/303150733877?chn=ps&norover=1&mkevt=1&mkrid=711-160867-114178-3&mkcid=2&itemid=303150733877&targetid=4580153135320191&device=c&mktype=&googleloc=&poi=&campaignid=422130742&mkgroupid=1224856194503968&rlsatarget=pla-4580153135320191&abcId=9300660&merchantid=51291&msclkid=895446357ac318c000de242b2c709849