Clé de Cartier watch, 40 mm, Manufacture self-winding mechanical movement, caliber 1847 MC. 18K yellow gold case. 18K yellow gold key set with a sapphire. Silvered flinqué sunray effect dial, Roman numerals. Blued-steel sword-shaped hands. Sapphire crystal and case back. 18K yellow gold bracelet. Case thickness: 11.76 mm. Water-resistant to 3 bar (approx. 30 meters/100 feet).