Most of the important info relating to reference and movement calibre are inside the caseback or on the movement itself. Getting a watchmaker to remove the back will give you access to this info.
Maybe one of these diamond watches with the 620-625 caliber a Omega made. As said above, more info on the inside of the back.
Thanks for asking politely - its nice to have someone end a request with a 'thank you!' As others have mentioned, additional info would help. See this thread for deets.
That bottom # is NOT a serial number. The serial # is on the movement. You can post the caseback without blocking anything out.
I've have always wondered: why do people block out a serial number anyway? It is not as if it is personally identifiable information. Is there some good reason people do this?
There's not much more to tell than you already know. The case is hallmarked with the Swiss mark for 18K gold and was made by Manufacture Favre & Perret SA of La Chaux-de-Fonds, Switzerland.
This watch looks very similar to these two: https://omegaforums.net/threads/omega-18k-diamond-watch-510-movement-buddy-holly-style.7124/ And the real Buddy Holly (not Elvis, he had a Seamaster) watch: http://www.omegablogger.com/archives/127 The lugs on the OP's watch are totally different than these two, but all are from the mid-to-late 1950's, are solid white gold and manual wind. Nice find, gatorcpa
Thank you! It’s very similar to those. The next step is order the archive extract from Omega. The movement serial begins with 14XXX placing the watch a little older than the other look a like examples
I have been told it is to prevent other unscrupulous sellers from taking your image with a valid serial number and passing it off as their own (inserting into their own For Sale posts, sending directly to interested buyers requesting more info, etc.)