One of the better looking tuning fork Omega Constellation packages. All steel with Omega integrated bracelet fitting wrists up to 190mm. The Omega movement in this watch was licensed from Bulova & ESA. Patent D2Y2, base stamped ESA 916, Omega signed caliber 1250, Omega serial number on movement is 34632634. Case manufacturer is CB. Omega reference number 198.0006. This model use a Renata 344 battery, have 36mm diameter and dates from ca. 1972. We are looking for extra bracelet links to be able to offer this watches to larger wrist sizes. Please let us know if you have some, or know of a source for correct links (Omega bracelet 1192/192).