Cartier Rotonde Double Mystery Tourbillon
The flying tourbillon, which turns once on its own axis every 60 seconds, appears to be floating completely free in space, with no visible connection to any gear train. The illusion is complete when the same tourbillon cage starts to perform a second rotation at a rate of one turn every five minutes.
The case, in platinum, measures 45mm. It had double AR-coated sapphire crystals and it is water resistant to 30 meters. The crown, in platinum, is set with a sapphire cabochon.
Movement is the Swiss manual-wind Cartier in-house caliber 9454MC with 25 jewels, 21,600 vph and a power reserve of 52 hours. It is a double mystery tourbillon hallmarked with the Geneva Seal.
The dial is slate-colored, galvanised, guillochéd, silvered open-work grill with sunray efect, black transferred Roman numerals with sword-shaped hands done in blued steel.
The strap is black alligator with double adjustable folding buckle in 18kt white gold.