Cartier Rotonde de Cartier Annual Calendar Watch - 45 mm White Gold Case - Slate Dial - Black Alligator Strap - W158000245 mm by 14 mm thick 18K white gold case, sapphire back, beaded crown set with sapphire cabochon, sapphire crystal, slate dial with silvered open work grid and Roman numerals with blued hands, caliber 9908 MC automatic movement with annual calendar complication, days and months indicated by a hand, large date at 12 o'clock, black alligator strap with 18K white gold buckle, buckle double deployant. Water resistant to 30 meters.

Water resistant to 50m (5 ATM)

dark brown alligator skin strap

leather strap with Nautilus fold-over buckle

steel bracelet with SmartLink adjustment system

white dial with silvered openwork grid

microblasted titanium bezel with 6 h-shaped titanium screwsblack composite resin lower bezel

Roman numerals with 11 rubies set on VI

approximately 45 hour of power reserve

titanium buckle with king power deployant

00ct and 6 H-shaped titanium screws

1 mm 18K yellow gold case

interchangeable full back and sapphire crystal case back