Chopard L.U.C Perpetual Twin The L.U.C Perpetual Twin offers a new approach to the perpetual calendar ensuring maximum readability. A large twin-aperture date display, a flagship complication of the L.U.C collection, is positioned at 12 o’clock, while the days and months each have their own dedicated outsized subdial. Case (stainless steel); total diameter (43 mm) and strap (hand-sewn black alligator leather with alligator leather lining)