Omega Deco Style Tank Wristwatch Caliber 20F in Stainless Steel Case with Sunrise Dial Circa 1934This Watch We have here a classic Omega Deco style wristwatch, circa 1934. The off white silvered dial has age and patina but does not detract from its character. The dial design is very much taken from the Art Deco period, with bold lines and a central circle tracking. One of the earliest Omega pieces we have in stock, this watch is a real piece of omega history. The watch houses one of the first Omega rectangular calibers, named 20F, and is an