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Case reference is 2704-1, of which there are a number of examples on the internet.
If the number in the little key symbol is a 2 (I can't quite make it out), it means the case was made for Omega by F. Baumgartner SA of Genève.
The lower number may be related to the movement serial, but that's not visible.
The hands don't appear to be correct for this dial configuration.
Thank you very much for your reply. There must be something wrong on my end, I can’t seem to find any 2704-1 example. The number inside the key is “3”, seem to be an unofficial manufacturer.
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