Rotonde de Cartier Chronograph watch

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