Cartier Rotonde de Cartier Astrocalendaire Watch - 45 mm Platinum Case - Silver Dial - Black Alligator Strap - W1556242

45mm platinum case, 15.1mm thick, sapphire back, beaded platinum crown set with a blue sapphire cabochon, sapphire crystal, silver dial with silvered grid with black transferred Roman numerals, sword-shaped blued steel hands, 9459 MC self-winding movement with circular display perpetual calendar and tourbillon complications, approximately 50 hours of power reserve, black alligator strap, 18K white gold double adjustable folding buckle. Water resistant to 30 meters.