I am not aware of an 1121 from Omega, and some things on that movement are certainly questionable. If I could make out the serial number I would try to look it up, but it's not clear enough that I can make it out in the photo.
To me this looks like someone has taken a main plate from some fake movement, and put genuine Omega bridges on it. I have never seen an Omega movement that has their specific bridge design (as opposed to the typical 2892 design) that does not have perlage on the main plate.
Would love to have a shot showing the serial number, or with the balance wheel stopped...
Very fishy...
Cheers, Al
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