Cartier Ballon Bleu de Cartier

The Ballon Bleu de Cartier reference WGBB0017 has a round case in rose gold 750/1000. The case is 13 mm thick, and Cartier rates it to 30 metres. The movement is self-winding and mechanical, with a 40 hour power reserve. A sapphire crystal covers the silvered guilloché lacquered opaline dial, which has Roman numerals and blued-steel sword-shaped hands. Central seconds and a date are shown, with the calendar aperture at 3 o'clock. The fluted crown is set with a blue cabochon-shaped sapphire. An alligator-skin strap is fitted to the watch, with a rose gold double adjustable folding buckle.