Vintage omega cocktail help

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Don’t know much about this watch and I can’t find much online that match the face and bracelet. Was my grandmas. Any help would be greatly appreciated!

 
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Lovely piece. A few things your photos already tell us:


  • Case: the “14K GOLD” stamp on the back means a solid 14k gold case, white gold by the look of it. Omegas sold in the US in that era were often cased in America and stamped like this rather than with Swiss hallmarks. The diamonds around the bezel and on the shoulders are part of the case design.
  • Bracelet: the clasp reads “Kestenmade 1/20 10K G.F. U.S.A.” Kestenmade was an American bracelet maker, and “1/20 10K G.F.” means gold-filled, not solid gold. So the bracelet was fitted in the US and isn’t an Omega part. That’s normal for these.
  • Box: the red “World Renowned for Accuracy” box is a genuine vintage Omega box.

To pin down the exact model and year, the answers are inside the back:


  1. The inside of the case back has a case number and markings.
  2. The movement has a calibre number and an 8-digit serial number. The serial dates the movement to within about a year.

Have a jeweller or watchmaker open the back (please don’t pry it yourself) and photograph both. Post those here and we can tell you the calibre and date.
 
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As noted above, it's a US cased Ladies cocktail watch, probably powered by a caliber 440 or 640.
The Sapphette label in the box is misleading as the watch in't a Sapphette, this was a line of similar watches that had a synthetic sapphire crystal with facets around the perimeter.
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I would get the part of the bracelet with gems tested. The stones appear real (no mirrored backing) and colour looks a bit different than the gf snake chain part.

Probably original to the watch. Something got worn or damaged over time and the GF part added