Ballon Bleu de Cartier watch, 40 mm, mechanical movement with automatic winding, calibre 1847 MC. Steel case, fluted crown set with a synthetic cabochon-shaped spinel, blued sunray-brushed dial, silvered sword-shaped hands, sapphire crystal, interchangeable steel bracelet, calendar aperture at 3 o'clock. Thickness: 12.4 mm. Water-resistant to 3 bar (approx. 30 metres).