Ballon Bleu de Cartier watch, 40 mm. Mechanical movement with automatic winding, caliber 1847 MC. Steel case, fluted steel crown set with a synthetic cabochon-shaped spinel. Sunray brushed dark green dial. Silvered sword-shaped hands. Sapphire crystal. 2 interchangeable straps in leather and steel. Calendar aperture at 3 o’clock. Thickness: 12.4 mm. Water-resistant up to 3 bar (approx. 30 meters).