Ballon Bleu de Cartier watch, 42 mm WE900851

Case in 18K rose gold set with round-cut diamonds, 18K rose gold fluted crown set with a blue sapphire cabochon, sapphire crystal, silvered opaline dial, ‘guilloché’ and lacquered, Roman numerals, sword-shaped blued-steel hands, alligator-skin strap, 18K gold double adjustable deployant buckle, mechanical movement with automatic winding Cartier caliber 049, water resistant to 30 meters / 100 feet. Case dimensions: 42.1 mm diameter, 13 mm thick.