Cartier Ballon Bleu de Cartier

The Cartier Ballon Bleu de Cartier, reference HPI01515, has a 37 mm case in 18K white gold. The case is 13.17 mm thick and is set with 129 brilliant-cut diamonds totaling 1.45 carats. A sapphire crystal covers the dial. The dial shows hours and minutes. The movement is self-winding mechanical, with a 39 hour power reserve. The hands are polished blue and sword-shaped, and the crown is set with a sapphire. Cartier rates the case to 30 metres. A red or blue alligator-skin strap is fitted to the watch with a folding clasp.