Cal. 2120/2802 nickel-finished lever movement 38 jewels 21K white gold rim to the blackened skeletonized rotor the textured black dial with applied white gold dot numerals white gold hands four subsidiary dials indicating month combined with leap year display day date and phases of the moon combined with lunar calendar in tonneau-shaped water-resistant-type case with octagonal platinum bezel secured by eight white gold screws screw down crown the glazed display back secured by eight screws stainless steel Audemars Piguet link bracelet and deployant clasp case dial and movement signed