Help to identify this Omega watch

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All the information you need is inside the watch. Have a professional open it, take lots of photos of the inside of the case back and movement numbers and then use Google. You should find out all you need to know. Good luck.
 
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BTW, the top half of the bracelet is on upside down.

Some additional photos might help, like the back.
 
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It looks a bit like a Dennison 13322 but of its American like the bracelet maybe it’s not.