Ballon Bleu de Cartier watch, 42 mm. Mechanical movement with automatic winding, caliber 1847 MC. 18K pink gold case, fluted crown set with a cabochon sapphire, blue guilloché dial. Sword-shaped hands. Sapphire crystal. Navy blue leather strap, 18K pink gold interchangeable deployant buckle. Calendar aperture at 3 o’clock. Thickness: 13 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).