This Vintage Cartier Paris Centure PM Octagon Shape watch is the medium size, circa 1975-1980. It is made in 18K yellow gold and measures 25 x 25 mm with a mechanical manual wind 17-jewel movement. It has the black lizard strap with Cartier buckle. It is triple signed: Dial, Case, Movement. Additionally, the watch comes with a one year movement guarantee.