That set was on
EbayPurchases made through these links may earn this site a commission from the eBay Partner Network in December. I was curious too, but I think the seller's "baggie" was someone's never-completed franken project. My best guesses:
-Mid-Case could be a custom-PVD case to a 176.007 or similar
-crystal/bezel could be from a 176.0010 or a Tissot Navigator
-Caseback =?? Who knows. I'm leaning fake.
Omega never branded it "7750", it was always modified and relabeled as an Omega calibre. Even so, the outside of the caseback is not marked in anyway similar to how Omega did in the past. And Omega using a Valjoux 7750, even in a prototype, makes no sense at all for the 1970s, as Valjoux and Lemania were rivals at this time.
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