Ballon Bleu de Cartier watch, 42 mm, Manufacture mechanical movement with automatic winding, caliber 1847 MC. Case in yellow gold 750/1000, fluted crown set with a blue cabochon-shaped sapphire, silvered guilloché and lacquered opaline dial, Roman numerals, blued-steel sword-shaped hands, sapphire crystal, yellow gold 750/1000 bracelet. Case dimensions: diameter: 42 mm, thickness: 13 mm. Water-resistant to 3 bar (approx. 30 meters).