This Vintage Cartier Paris Centure Octagon Shape watch is the medium size, circa 1975-1980. It is 18K yellow gold and measures 28 x 28 mm with a mechanical manual wind 17-jewel movement. It has the original black lizard strap with 18K Cartier buckle. It is triple signed: Dial, Case, Movement. Additionally, the watch comes with a one year movement guarantee.