You’ve seen four balances in one watch, two double toubillons in one watch, and even three tourbillons spinning upon a carousel. It’s about time to witness four independent tourbillons in one watch!
Histoire de Tourbillon 10 marks the 10th anniversary of the collection with two 10-piece editions and a special Winstonium – a trademark platinum alloy – unique piece. Arranged in a symmetrical order, the four independent carriages rotate in 36 seconds. Their operation is unified by three differentials. The first is connected to the two tourbillons on the left, while the second is connected to those on the right side of the case. The third one located in a central position averages the two previous differentials and transmits the information to the hands. All this complex mechanics is powered by two pairs of fast-winding barrels that are overlaid, mounted successively, and then connected to the tourbillons.
A rectangular case of a crazy 53.3 x 39.1 mm proportions was needed to realize the complication. The four tourbillons of the HW4702 caliber are seen in the four corners of the case, housed in a glass box and supported by two transverse openworked bridges. The Winstonium piece can be recognized by its two large blue tourbillon bridges while the rest of the platinum is completely rhodium-plated. The white gold version features rhodium-plated tourbillon bridges and dark grey platinum. This shade is repeated on the back of the barrel bridge. Finally, the version with the rose gold case inverts its colors in the barrel bridges and features a rhodium-plated platinum.
The dial is a single component sapphire crystal piece. Its central part is a hollow circle that hosts the 12 hour markers for the chapter ring. The strap of each Histoire de Tourbillon echoes the various models. The Winstonium and white gold versions are mounted on alligator leather with large scales and topstitched with a platinum thread. And, the pink gold version launches a new color: black with copper highlights enhanced by topstitching in rose gold thread.