Cartier Ballon Bleu de Cartier

Cartier's Ballon Bleu de Cartier, reference W2BB0037, has a 33 mm steel case. The round case is 10.16 mm thick and has a sapphire crystal over the silvered guilloché dial. The hands are blued steel and sword-shaped. Calibre 1853 is a self-winding mechanical movement with a power reserve of 37 hours. The watch displays hours, minutes and central seconds. The crown is fluted and made of 750/1000 yellow gold, and a synthetic cabochon-shaped spinel is set in it. Cartier rates the case to 3 bar, approximately 30 metres. An interchangeable two-tone strap is fitted to the watch.