1967 sea master tachometer?

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From searching thats what this watch appears to be. Correct? If not what?

Not sure about the band. No markings on case back so I'll have to have it opened to determine exact model number.
 
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It looks like a 105.001 powered by the legendary cal. 321. To me it looks ok, but i would suggest to post more pictures. I would say that the bracelet is not Omega.
 
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I think you meant to write "chronograph" instead of "tachometer". More and better photos will help, but at first glance the bracelet looks like it could be a NSA/Novavit.