Rotonde de Cartier 40 mm Chronograph watch, Manufacture self-winding mechanical movement, caliber 1904-CH MC. 18K pink gold case, diameter: 40 mm, thickness: 12.15 mm, beaded 18K pink gold crown set with a sapphire cabochon. Silvered sunray effect dial, blued-steel apple-shaped hands, blued-steel sword-shaped counter hands. Sapphire crystal. Brown semi-matte alligator skin strap, double adjustable folding 18K pink gold buckle. Calendar aperture at 6 o’clock, sapphire case back. Water-resistant to 3 bar (approx. 30 meters/100 feet).