Ballon Bleu de Cartier watch, 36 mm, mechanical movement with automatic winding. Steel case, fluted crown set with a cabochon synthetic spinel. Silver guilloché opaline dial. Blued-steel sword-shaped hands. Sapphire crystal. Black leather strap, steel interchangeable deployant buckle. Case thickness: 12.1 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).