Cartier Rotonde de Cartier Astromysterieux Watch - 43.5 mm Palladium 950 Case - W155624943. 5mm palladium 950 case, 12mm thick, sapphire back, beaded palladium crown set with a blue sapphire cabochon, sapphire crystal, white galvanized guilloche dial with apple shaped hands, caliber 9462 MC self winding movement with astromysterieux complication, mysterious central tourbillon, consisting of the escapement, balance, main geartrain and barrel and completing one full revolution in one hour, approximately 50 hours of power reserve, black