Help authenticating Omega bumper

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I’m looking for a 30.10RA and saw this one for sale my question is I’ve looked at several bumpers but this is the only one that has a fabrique en Swiss on it and I was wondering if it’s legit or not as I don’t see that on any other movements. Any help would be appreciated.
 
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Looks OK, most times the bridge only has the serial number, although I have seen some with Fabrique etc, possibly for the French import market?

It does have a replacement balance assembly though, OXG marking was for Omega movements imported into the US by Norman Morris Corp.
 
Posts
13
Likes
4
Looks OK, most times the bridge only has the serial number, although I have seen some with Fabrique etc, possibly for the French import market?

It does have a replacement balance assembly though, OXG marking was for Omega movements imported into the US by Norman Morris Corp.
Thank you