Cartier continues to reign as the master of watches with its latest collection, Clé de Cartier. With soft curves, clean lines, and a rounded profile, the Clé exudes a minimalist elegance. The design is a testament to precision, balance, and proportion. Great mastery went into creating fluid lines and a harmonious design. The 35 mm and 40 mm Clé de Cartier models house the caliber 1847 MC, the new Cartier Manufacture Movement. Clé de Cartier watch, 40 mm, Manufacture self-winding mechanical movement, caliber 1847 MC. Steel case. 18K rose gold key set with a blue synthetic spinel. Silvered flinqué sunray effect dial, Roman numerals. Blued-steel sword-shaped hands. Sapphire crystal and case back. 18K rose gold and steel bracelet. Case thickness: 11. 76 mm. Water-resistant to 3 bar (approx. 30 meters/100 feet).