Ballon Bleu de Cartier watch, 42 mm, self-winding mechanical movement. Rose gold 750/1000 case, fluted crown set with a blue cabochon-shaped sapphire, silvered guilloché lacquered opaline dial, Roman numerals, blued-steel sword-shaped hands, sapphire crystal, alligator-skin strap, rose gold 750/1000 double adjustable folding buckle, calendar aperture at 3 o’clock. Case dimensions: diameter: 42.1 mm, case thickness: 13 mm. Water-resistant to 3 bar (approx. 30 metres).