Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 double adjustable deployant buckle in

double adjustable deployant buckle in 18K pink gold

black lacquered polished dial with

white mother-of-pearl off-centred disc and small seconds counter dial with powdery gold-toned Roman numeral transfers

approximately 24 months of power reserve

and day display

Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 double adjustable deployant buckle in45. 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