10k real gold-plated case/bezel, stainless steel back, waterproof, shock resistant, self-winding, leather band gold buckle.
The inside of the case back has "21583" w/ the 5 underscored, "87XCX", and an illegible signature (possibly a date?) engraved/etched.





In reply to The year is just a guess. I… by cosmicboss
In reply to M0 on case back indicates… by neetstuf-4-u
In reply to Upon closer inspection, and… by cosmicboss
In reply to I think you mis-typed. Date… by neetstuf-4-u
In reply to 1960 Bulova American Clipper… by JimDon5822
Thank you again. I can confirm under 16x magnification that the movement sports a “N0”.
Does the M0 on the case takes precedence then over the mark on the movement? Or does it only mean that the parts were manufactured a different times? Perhaps the movement was replaced at some point?
In reply to Thank you again. I can… by cosmicboss
A 1960 case with a 1970 movement indicates that the movement has been replaced and would not be original to the watch. This throws a bit of a spanner in the works when correctly IDing a watch, as the key parts are no longer original. A one or two year gap is acceptable, but a 10 year gap typcally means we would ID as a non-conforming watch. You might need to triple check the date code on the movement. The 11AFAC should be M0 and not a N0.