Ballon Bleu de Cartier ultra-thin watch, 40 mm, Manufacture mechanical movement with manual winding, caliber 430 MC. 18K rhodium-finish white gold case, set with brilliant-cut diamonds, fluted crown set with a blue cabochon-shaped sapphire, 12-zone flinqué dial, silvered and lacquered dial with sunray effect, blued-steel sword-shaped hands. Sapphire crystal. Black semi-matte alligator-skin strap, double adjustable 18K rhodium-finish white gold folding buckle. Case dimensions: diameter: 40 mm, thickness: 6.9 mm. Water-resistant to 30 meters.