approximately 24 months of power reserve
caliber 9901 self-winding Co-Axial master chronometer movement with chronograph and date functions
and day display
white mother-of-pearl off-centred disc and small seconds counter dial with powdery gold-toned Roman numeral transfers
diamond-set 18K white gold pin buckle
Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 approximately 24 months of power45. 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