Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048

45.6mm x 51mm 18K white gold case, 16mm thick, sapphire back, octagonal crown set with a sapphire, sapphire crystal, slate dial with openwork satin-brushed silvered grid, sunray finish, black transferred Roman numerals, snailed counter, apple-shaped blued-steel hours and minutes hands, caliber 9422 MC automatic movement , perpetual calendar with days displayed by a retrograde hand, and months and leap years in a counter at 12 o'clock, approximately 52 hours of power reserve, black alligator strap, double adjustable deployant buckle in 18K pink gold. Water resistant to 30 meters.