Is this a game? Oooh fun I'll play. Is it a pre-deville? Seamaster text says late late 50's or 60-61 with a manual 6xx caliber inside? One of the first of its kind? That's my guess...
A "Kleerback"!!! Missed one of these (sold at a very reasonable price) at the last Labor Day weekend NAWCC Regional Mart in Chattanooga, TN It was not nearly as nice an example, but had potential with a new dial. Here is listing on eBay. http://www.ebay.com/itm/Vintage-Omega-KLEERBACK-Seamaster-DeVille-560-ULTRA-RARE-1964-Display-Back-Case/263193325267?ssPageName=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649Purchases made through these links may earn this site a commission from the eBay Partner Network Also, an old forum thread shedding light on this model, which some believe were only salesman samples. https://omegaforums.net/threads/dis...n-vintage-display-back-kleerback-omegas.1189/