The Vintage Wrist Watch Company has dated this piece to the 1960s.
The watch has a 17-jewel calibre 268 hand-winding movement which is working nicely. The movement is fully signed and it has the serial number 18,404,814 which dates it back to 1961.
The watch measures 35mm diameter excluding the signed Omega winding crown and the lugs.
The screw-on case back has the Seamaster logo to the outside, and the Omega logo to the inside along with the case reference 14389-12-CSP which is correct for the calibre 268.

The lens has a couple of short light scratches, only about 3mm long, not too detrimental at all.
The signed dial looks to have been professionally refinished at some point. Original hands.
A new leather strap has been fitted.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1960s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page