Chopard’s L.U.C collection, named for the initials of founder Louis-Ulysse Chopard, represents what the maison calls its “epitome of fine watchmaking.” Fewer models exemplify that spirit more spectacularly than the L.U.C Perpetual T, which combines two of high horology’s most complex mechanisms: a tourbillon and a perpetual calendar. The latest evolution of this timepiece, garbed for the first time in Chopard’s signature “ethical” white gold, will be presented at the upcoming WatchTime Live virtual collectors’ event on October 22-24.

The L.U.C Perpetual T has a new white gold case and copper-colored dial.

The L.U.C Perpetual T packs all of its functions and displays into a 43-mm case made of ethically sourced 18k white gold, a material that Chopard has been introducing steadily into both its watches and jewelry. Its copper-colored dial is also made of solid gold and decorated with a hand-engraved guilloché pattern that radiates not from the dial’s center but from the large date display at 12 o’clock. That big date, of course, is just the tip of the horological iceberg. In addition to the traditional central time indication, on rhodium-plated Dauphine hands, the dial offers the following, starting clockwise at 12 o’clock: the aforementioned date display under the L.U. Chopard logo; the perpetual calendar’s month and leap year display at 3 o?clock; the tourbillon, with a polished steel bridge and s...