Cartier Rotonde de Cartier Annual Calendar Watch - 40 mm Pink Gold Case - Grey Dial - Brown Alligator Strap - WHRO000240mm 18K pink gold case, 13. 26mm thick, sapphire back, beaded 18K pink gold crown set with a blue sapphire cabochon, 18K pink gold bezel, sapphire crystal, grey dial, caliber 9908 self winding movement with blued steel sword shaped hands, hammer shaped hand with a red tip. annual calendar complication with days indicated by a hammer shaped hand and months by a disc, large date at 12 o'clock, approximately 48 hours of power reserve, brown alligator