My mother inherited this watch from my grandmother. Can anyone help us know how much it is worth?
The value of your Omega watch depends on its condition, the model, and many other factors. Most Omega watches from the 1980's on up will likely sell for a minimum of $500. (About 50% of their original retail price.) Omega watches are almost always appraised at a decent value. On vintage Omega timepieces, the serial number is engraved on the inside of the case back. Your watch is valuable and you'll want to have it appraised by a jeweler.
This vintage Omega watch is listed for $4200:
www.ebay.com/
This vintage Omega watch is listed for $6700:
www.nyjchicago.com/
Here are 2 sites that also purchase vintage Omega watches:
www.bobswatches.com/
If it is real gold and has diamonds, you could easily get $800 and even more
No one can appraise this watch without knowing important information and that will require a 'hands-on' examination.
It could be white gold or platinum and the size, clarity, etc of the diamonds will determine the value.