This Cartier Santos-Dumont Skeleton Ref W2020052 in titanium with ADLC coating is rated 9.8 out of 10, it comes with box and paper dated in September 2013.
Santos-Dumont Skeleton watch, XL, Manufacture mechanical movement with manual winding 9612 MC. Titanium case with ADLC coating, faceted crown set with a black faceted spinel, dial of Roman numerals formed by the movement bridges, sword-shaped hands in rhodium-finish brass. Strap in black alligator skin with double adjustable folding buckle in 18K white gold with ADLC coating. Skeleton complication of bridges in the form of Roman numerals. Individually numbered movement comprised of 138 parts including 20 jewels. Movement dimensions: 28.6 mm x 28.6 mm, movement thickness: 3.97 mm, balance: 28,800 vibrations/hour, power reserve approx. 72 hours. Sapphire case back. Case thickness: 9.4 mm. Water-resistant to 3 bar (30 meters/100 feet). Retail price: $66000