The Jaeger-LeCoultre Duometre Grande Complication A Grande Sonnerie Q603H480, a unique piece from 2026, showcases an impressive combination of features such as a Grande Sonnerie, Petite Sonnerie, minute repeater, retrograde perpetual calendar, and a flying tourbillon, all housed within a 45mm case that has a thickness of 16.16mm. Crafted from 18k 5N pink gold, the case is supported by a titanium internal structure, enhancing the acoustic capabilities of the striking mechanism.

The intricate openworked dial highlights the manually wound caliber 182, with a primary dial in a dark blue-gray lacquer finish that complements the prominent subdial for hours, minutes, and the calendar. A sunray-brushed texture adorns the center, while the gradient lacquer over sunray guilloché enhances the pink gold hour markers. The retrograde perpetual calendar presents the date along an arc from 7 to 11 o'clock, with additional retrograde displays for both the day and month, and a digital window at 12 o'clock shows the leap year status. Power reserve indicators for both timekeeping and chiming mechanisms are visible through the openworked sections. The mode selector at 6 o'clock allows for the Grande Sonnerie, Petite Sonnerie, silent, and time-setting options, and a pusher integrated into the crown engages the minute repeater, complemented by another pusher for selecting the chiming mode and a pusher above for correcting the day. Date and month correctors are discreetly tucked between the lugs at 12 o'clock. The transparent sapphire crystal case back offers a view of the flying tourbillon and the meticulously finished movement. This exquisite timepiece is finished with a black alligator leather strap and features a pink gold folding buckle with a patented micro-adjustment mechanism.