Ballon Bleu de Cartier watch, 36 mm, self-winding mechanical movement. Steel case, fluted 18K yellow gold crown set with a synthetic cabochon-shaped spinel, silvered guilloché opaline dial, Roman numerals, blued-steel sword-shaped hands, sapphire crystal, 18K yellow gold and steel bracelet. Case dimensions: diameter: 36.6 mm, case thickness: 12.05 mm. Water-resistant to 3 bar (approx. 30 meters/100 feet).