Ballon Bleu de Cartier watch, 36 mm, mechanical movement with automatic winding. Steel case, 18K yellow gold fluted crown set with a cabochon synthetic spinel. Silver guilloche dial. Blued-steel sword-shaped hands. Sapphire crystal. Two-tone interchangeable bracelet. Case thickness: 12.1 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).