Ballon Bleu de Cartier watch. 28 mm. quartz movement. Steel case. fluted crown set with a synthetic cabochon-shaped spinel. silvered opaline dial. Roman numerals. blued-steel sword-shaped hands. sapphire crystal. Interchangeable steel bracelet. Case dimensions: diameter: 1.1. thickness: 0.34. Water-resistant up to 3 bar (approx. 30 meters/100 feet).