Cartier Ballon Bleu de Cartier

Cartier makes the Ballon Bleu de Cartier, reference WSBB0040, with a 40 mm round steel case. The case is 12.4 mm thick. Calibre 1847 MC is a self-winding Manufacture mechanical movement with a 40 hour power reserve. A sapphire crystal covers the silvered guilloché dial. The hands are blued steel and sword-shaped, and the dial has central seconds and a date, with a calendar aperture at 3 o'clock. The fluted steel crown is set with a synthetic cabochon-shaped spinel. Cartier rates the case to 3 bar, approximately 30 metres. A steel interchangeable bracelet is fitted to the watch.