Cartier Mysterious Double Tourbillon pocket watch

Cartier Mysterious Double Tourbillon pocket watch, 55 mm, Manufacture mechanical movement with manual winding, calibre 9454 MC. White gold 750/1000 case, beaded crown set with a cabochon-cut sapphire, white gold 750/1000 guilloché dial covered with black translucent enamel, rhodium-finish steel sword-shaped hands. 750/1000 gold chain. Stand in rock crystal, black jade and white gold 750/1000. Mysterious double tourbillon complication. Movement consisting of 242 parts including 25 jewels. Movement diameter: 35.5 mm, movement thickness: 5 mm, balance: 21,600 vibrations/hour, power reserve approx. 52 hours. Sapphire crystal and case back. Case thickness: 11.2 mm. Water-resistant to 3 bar (approx. 30 metres).