Ballon Bleu de Cartier Blue Balloon Watch, 40mm model, Cartier 1847 MC workshop refined automatic winding mechanical movement. Stainless steel case, stainless steel grooved crown, embedded with a convex circular synthetic spinel. Sunray patterned brushed finish dark green dial. Sword shaped silver plated pointer. Synthetic sapphire crystal mirror. Replaceable stainless steel watch chain. Set up a date window at 3 o’clock. Thickness: 12.4 millimeters. The waterproof depth for daily use is 3 bar (approximately 30 meters).