Vintage movement identification

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Hi, I’ve got this old watch on my table atm. I need to identify this movement. Need to buy a balance wheel. could somebody help me.
the closest movements I can find are omega trench movements. thanks a lot!
 
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Did you try the ranfft database?


Looks like an AS to me though.
 
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Not an Omega caliber, very unusual setting works. Dimension (diameter in millimetres) across the main plate will help track it down.