Please consider donating to help offset our high running costs.
You have the reference number on the inside of the caseback and the movement serial with which to date it (plenty of tables on the internet).
Personally, I've never seen an Omega with the crown on the back like that. Pretty neat.
Thanks! I did not know that the year could be deduced from that number. The number is about 18 million and according to the tables, it's from 1961.
That style of movement has been used by several watch manufacturers on fancy rectangular ladies dress watches. The movement is “back-set”. The case is marked .750 which is 18-karat gold. The integral bracelet is likely also 18 karat gold, and if so, it will likely be marked .750 on the clasp. On a watch of this quality, the diamonds are likely full cut, but this doesn’t show in you pictures.
I can’t speak for the bulk of horological society, but I think this is a very special watch, regardless of wether it’s your taste or not. My hope is that you get it properly serviced by a watchmaker who is skilled with vintage Omega (don’t take it to or send it to Omega) and have it properly serviced. Then keep it in the family. This is an heirloom quality piece.
Thank you very much for all your appreciations and advice, they are very useful to me. Thanks to the mark (Geneva Key) that appears on the caseback, I've figured out that the manufacturer of the box is F. Baumgartner SA.
The watch works but it gains 15' in an hour. Why shouldn't I send it to Omega?