Ballon Bleu de Cartier watch. 33 mm. mechanical movement with automatic winding. Steel case. fluted crown set with a synthetic cabochon-shaped spinel. blue silvered sunray-brushed dial. blued-steel sword-shaped hands. sapphire crystal. interchangeable steel bracelet. Thickness: 9.96 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).