This is one of the nicest two-tone case Omega Seamaster 600 timepieces, and it's an uncommon model. It's a transitional Seamaster 600 with the extra Genève print on the dial. The case model is 136.011, which is a Seamaster 600 case model initially; however, at the very end of the 1960s, it gets replaced with just the word Genève. The gold plated over solid stainless steel original case is in excellent unpolished condition. Case measures 34.6mm across, excluding the crown by 39.6mm lug tip to lug tip. Brand new acrylic crystal. Brand new case back gasket. Original signed crown. The factory original dial is in superb condition. Professionally serviced manual wind movement working solid and accurate. The movement is an Omega caliber 613 with serial number 26160617, dating this timepiece 1968. The calendar has quick set feature. This watch will come with a brand new 18mm high-quality genuine leather strap. The wrist size in the photo is 6 inches.