Ballon Bleu de Cartier watch, 36 mm. Self-winding mechanical movement. Case in 18K rose gold, fluted crown set with a blue cabochon sapphire, guilloché and lacquered silver opaline dial, Roman numerals, sword-shaped hands in blued steel, sapphire crystal, two calfskin straps, gold ardillon buckle 18 carat pink. Case Dimensions: Diameter 36.6mm, Thickness 12.05mm. Waterproof up to 30 meters.