Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 and day display

and day display

black lacquered polished dial with

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

39mm x 31mm 18K rhodium-finish white gold case brilliant-cut diamond

caliber 9901 self-winding Co-Axial master chronometer movement with chronograph and date functions

Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 and day display45. 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