Sharp unpolished stainless steel screw back case with crisp hippocampus, tapered faceted lugs, wide beveled bezel, and signed crown. Showing only light marks typical of its age with a clean original Omega cyclops crystal. More distinctive and way less common (actually quite uncommon) than the Seamaster 600, definitely a more upscale watch. Immaculate 17-jewel TWO (2) adjustment caliber 610 hand wind movement with date. Service history unknown but presently running well, serial number dates to ca 1961. Superb original sunburst silver dial with cross-hairs, applied figures with onyx inserts and Omega logo. Excellent showing very minimal aging when viewed under a loupe. 33.5-mm not including the signed crown x 40.6-mm lug tip to lug tip, bracelet will fit up to a 7-3/4 inch wrist. Last photo shows it on my 7-1/4 inch wrist. Click photos for full size. Sorry, all sales final unless grossly misrepresented. $950.00, US shipping included, international shipping OK, cost by location. Payment to be discussed. *