Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 caliber 9901 self-winding Co-Axial master

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

President bracelet with semi-circular three-piece links

double adjustable deployant buckle in 18K pink gold

diamond-set 18K white gold pin buckle

Cartier Tortue Perpetual Calendar Watch - 45.6 mm White Gold Case - Black Alligator Strap - W1580048 51 caliber 9901 self-winding Co-Axial master45. 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