Ballon Bleu de Cartier ref W6920037 (2012) exudes timeless elegance with a 42 mm 18K rose gold case and a fluted crown set with a blue sapphire cabochon. Its chocolate guilloché dial features Roman numerals, rose gold-plated sword-shaped hands, and a date window at 3 o’clock. Powered by a mechanical self-winding movement, this watch pairs with a leather strap secured by a double adjustable 18K rose gold folding buckle. Sapphire crystal protects the dial, while the 13 mm thick case is water-resistant to 30 meters.