Ballon Bleu de Cartier watch, 36 mm, mechanical movement with automatic winding. Yellow gold 750/1000 case and fluted crown set with a cabochon sapphire. Silver guilloché dial. Blued-steel sword-shaped hands. Sapphire crystal. Yellow gold 750/1000 interchangeable bracelet. Case thickness: 12.1 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).