Ballon Bleu de Cartier watch, 36 mm. Mechanical movement with automatic winding. Steel case, fluted 18K yellow gold (750/1000) crown set with a synthetic cabochon-shaped spinel. Silver guilloché dial. Blued-steel sword-shaped hands. Sapphire crystal. Interchangeable two-tone strap. Thickness: 12.1 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).