Cartier Ballon Bleu de Cartier

The Cartier Ballon Bleu de Cartier, reference WSBB0039, has a round 40 mm steel case. The case is 12.4 mm thick. The Ballon Bleu's movement is caliber 1847 MC, a self-winding mechanical movement with a 40 hour power reserve. A sapphire crystal covers the silvered guilloché dial, which carries blued-steel sword-shaped hands. The dial has central seconds and a date aperture at 3 o'clock. The fluted crown is set with a synthetic cabochon-shaped spinel. Cartier rates the case to 30 metres. An interchangeable black alligator leather strap is fitted, with a steel folding clasp.