Rotonde de Cartier Skeleton watch, 42 mm, Manufacture mechanical movement with automatic winding, caliber 9621 MC. Titanium case, beaded crown set with a green tourmaline cabochon, black steel sword-shaped hands with luminescent material. Strap in Green alligator leather, steel double adjustable folding buckle. Titanium skeletonized bridges forming Roman numerals. Green lacquer dial. Individually numbered movement consisting of 165 parts including 28 jewels. Movement diameter: 31 mm, movement thickness: 5.6 mm, balance: 28,800 vibrations/hour, power reserve approx. 48 hours. Sapphire crystal case back. Case thickness: 11.8 mm. Water-resistant up to 3 bar (approx. 30 meters/100 feet).