Ballon Bleu de Cartier watch, 42 mm. Mechanical movement with automatic winding, caliber 1847 MC. 18K rose gold case and fluted crown set with a cabochon sapphire. Silver guilloché dial. Blued-steel sword-shaped hands. Sapphire crystal. Calendar aperture at 3 o’clock. 18K rose gold interchangeable bracelet. Case thickness: 13 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).