Rotonde de Cartier watch, Calendar Aperture and Power Reserve

Rotonde de Cartier watch, 40 mm, Calendar aperture and power reserve, Manufacture mechanical movement with manual winding, calibre 9753 MC. Case in steel, diameter: 40 mm, thickness: 8.94 mm, fluted crown decorated with a synthetic cabochon-shaped spinel, silvered guilloché dial with calendar aperture at 12 o'clock, apple-shaped hands in blued steel, black alligator-skin strap, 18 mm double adjustable folding buckle in 18K steel, power reserve at six o'clock, water-resistant to 3 bar (approx. 30 metres).