Rotonde de Cartier Astrotourbillon, 47 mm, Manufacture mechanical movement with manual winding 9460 MC. Niobium-titanium case, beaded crown set with a black spinel cabochon, slate-gray galvanized dial with satin-finish sunray effect, white transferred Roman numerals, rhodiumized steel sword-shaped hands with superluminova coating. Black alligator-skin strap, double adjustable 18K white gold folding buckle. Astrotourbillon complication with carriage rotating around the dial in 1 minute, tourbillon carriage and escapement in carbon crystal requiring no regulation or lubrification. Individually numbered movement comprised of 249 parts, including 17 jewels. Movement diameter: 40.1 mm, movement thickness: 9 mm, balance: 21,600 vibrations/hour, power reserve approx. 48 hours. Sapphire case back. Case thickness: 15.5 mm. Water-resistant to 3 bar (30 meters/100 feet).
The Rotonde de Cartier collection showcases the most advanced movements in Cartier Fine Watchmaking: the Astrorégulateur, minute repeater, Astrotourbillon and skeleton grande complication.