Ingenieur Perpetual Calendar | 41MM | IW344904

The Ingenieur Perpetual Calendar 41 is the first titanium model to unite Gérald Genta’s iconic Ingenieur design with Kurt Klaus’s crown-controlled perpetual calendar. Crafted in lightweight Grade 5 titanium, it features a 41mm case and integrated bracelet for exceptional comfort, finished with a refined mix of sandblasted, satin-brushed, and subtly polished surfaces that emphasize its precise geometry. The matte grey dial showcases the signature grid pattern, adding depth and structure, while black hands and applied indices filled with Super-LumiNova® ensure optimal legibility. A perpetual calendar displays the date, day, month, and moon phase, with a highly accurate moon phase mechanism that deviates by just one day over 577.5 years and a leap year indicator integrated into the 9 o’clock subdial. Powered by the IWC-manufactured 82600 calibre with a Pellaton winding system and ceramic components, it delivers a 60-hour power reserve and can be admired through the sapphire case back.