Cartier Ballon Bleu de Cartier

The Ballon Bleu de Cartier reference W69012Z4 has a round steel case. The case measures 13 mm in thickness. Cartier rates the case to 3 bar, approximately 30 metres. The movement is a self-winding mechanical type with a power reserve of 40 hours. A sapphire crystal covers the silvered guilloché dial, which has Roman numerals and blued-steel sword-shaped hands. Functions are hours, minutes, central seconds and a date, with the calendar aperture at 3 o'clock. The fluted crown is steel and is decorated with a synthetic spinel cabochon. A steel bracelet is fitted to the watch.