Ballon Bleu de Cartier watch, 42 mm. Self-winding mechanical movement, caliber 1847 MC. Stainless steel case, armrest crown set with cabochon spinels. Silvered guilloche ceiling. Sword-shaped blued steel hands. Sapphire crystal. The calendar window is located at 3 o'clock. Dockable steel bracelet. Thickness: 13mm. Waterproof to a depth of 3 bar (approximately 30 meters).