Cartier Santos-Dumont skeleton

Cartier's Santos-Dumont skeleton, reference HPI01631, has a 31.4 x 43.5 mm case in rhodium-finish 18K white gold. The case is 8 mm thick, and Cartier rates it to 30 metres. The case and bezel are set with 52 brilliant-cut diamonds. Calibre 9629 MC is a self-winding micro-rotor movement that runs at 28,800 vibrations per hour with a power reserve of about 44 hours. The crystal is sapphire, and the watch is skeletonized. A semi-matte dark blue alligator leather strap has a white gold pin buckle. The watch is a limited edition of 150 numbered pieces.