Rotonde de Cartier watch, Calendar Aperture and Power Reserve

Rotonde de Cartier watch, 40 mm, Calendar with aperture and power reserve, Manufacture mechanical movement with manual winding, calibre 9753 MC. Case in 18K rose gold, diameter: 40 mm, thickness: 8.94 mm, fluted crown decorated with a cabochon sapphire, silvered guilloché dial with calendar aperture at 12 o'clock, apple-shaped hands in blued steel, brown alligator-skin strap, 18 mm double adjustable folding buckle in 18K rose gold, power indicator at 6 o'clock, water-resistant to 3 bar (approx. 30 metres).