Ballon Bleu de Cartier watch, 40 mm, mechanical movement with automatic winding, caliber 1847 MC. Steel case, fluted crown set witha synthetic cabochon-shaped spinel, silvered guilloché dial, blued-steel sword-shaped hands, sapphire crystal, interchangeable bracelet in grained black alligator skin, steel interchangeable folding buckle, calendar aperture at 3 o'clock. Thickness: 12.4 mm. Water-resistant to 3 bar (approx. 30 meters).