The simple round case and modest grand feu enamel dial give the Ulysse Nardin Anchor Tourbillon (ulysse-nardin.com) the appearance of a conventional tourbillon. But the large and unusually shaped escape wheel points to this $89,400 watch’s unconventional engineering. The key component is the silicon anchor pallet—the device that transmits energy to the balance wheel. It uses two integral blade springs to provide the balance with constant impulses. Another watchmaker introduced a similar silicon-based design two years ago, but Ulysse Nardin’s greater familiarity with the material has enabled it to create a much smaller and more efficient mechanism for this timepiece.