Rotonde de Cartier Second Time Zone Day / Night 42 mm watch, Manufacture self-winding mechanical movement, 1904-FU MC caliber. 18K rose gold case, 11.96 mm thick, fluted crown set with a cabochon sapphire, guilloché silver dial with large date window at 12 o'clock, blued steel pomme-shaped hands, sapphire crystal, alligator strap brown, 18 mm double adjustable folding buckle in 18K rose gold, retrograde second time zone at 10 o'clock, day / night indicator at 3:30, small seconds at 6 o'clock, sapphire crystal caseback, water resistant to 30 meters.