Ballon Bleu de Cartier Blue Balloon Watch, 42mm model, Cartier 1847 MC workshop refined automatic winding mechanical movement. Stainless steel case, grooved crown, embedded with a convex circular synthetic spinel. Silver plated twisted rope engraved dial. Sword shaped blue steel pointer. Sapphire crystal mirror. Set a calendar display window at 3 o’clock position. Replaceable stainless steel watch chain. Thickness: 13 millimeters. Waterproof depth of 3 bar (approximately 30 meters).