Floating like a balloon and as blue as the sapphire safely nestled in its side, the Ballon Bleu watch by Cartier adds a dash of elegance to male and female wrists alike. Roman numerals are guided on their path by a sapphire cabochon winding mechanism guarded by an arc of precious metal. The convex curves of the case, guilloché dial, sword-shaped hands, and polished or satin-finish links of the bracelet ensure that the Ballon Bleu watch by Cartier floats within the world of Cartier watchmaking.Steel case, steel fluted crown set with a blue synthetic spinel cabochon, sapphire crystal, silvered and guilloché dial, Roman numerals, sword-shaped blued-steel hands, steel bracelet, mechanical movement with automatic winding Cartier calibre 049, water-resistant to 30 metres / 100 feet. Case dimensions: 42.1 mm diameter, 13 mm thickness.