Ballon Bleu de Cartier watch, 28 mm, quartz movement. 18K rose gold (750/1000) case, fluted crown set with a blue sapphire cabochon, lacquered silvered opaline dial, Roman numerals, blued-steel sword-shaped hands, sapphire crystal, alligator-skin strap, 18K rose gold (750/1000) ardillon buckle. Case dimensions: diameter: 28. 6 mm, thickness: 9. 35 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet). Floating like a balloon and as blue as the cabochon safely nestled in its side, the Ballon Bleu watch by Cartier adds a dash of elegance to male and female wrists alike. Roman numerals are guided on their path by a deep blue winding mechanism. With the convex curves of the case, guilloché dial, sword-shaped hands, and polished or satin-finish links of the bracelet...the Ballon Bleu watch by Cartier floats through the world of Cartier watchmaking.