Help please!

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Well, it's round. About all I can determine from the pic. Much clearer pictures needed. Out of focus does not help. You will need to have the back opened and a photo of the movement and inside of the case back.
 
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Not sure of the reference, but early bumper automatic. Nice watch

Nice black strap for dress or tan, brown for casual wear

DON
 
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As noted, much more information will be forthcoming if you can have the watch opened and post good clear photos of any numbers on the movement and inside the caseback.