This is Omega's CK1064, their first water-resistant pocket watch from the early 40's. According to Omega's ad, it was made with an extra robust staybrite case with a plastic resin gasket and high pressure caseback. It measures 51mm and has a beautiful large crown. The original silver dial is in beautiful condition and has lovely blue hands and big sub seconds. Movement is the high grade Cal. 35ST. This is one of the most desirable Omega pockets and will suit any Omega collection.