IWC Portugieser Eternal Calendar Watch

Experience exceptional craftsmanship with the IWC Portugieser Eternal Calendar IW505701. This remarkable timepiece features a secular perpetual calendar that elegantly adapts to the Gregorian calendar's complexities. With its ultra-precise moon phase display and finely engineered platinum case, it embodies both sophistication and innovation. The black alligator leather strap adds a touch of luxury, while the glass elements enhance its transparency, offering a unique sense of lightness and timeless elegance. From the brand: IWC Watch Portugieser Eternal Calendar IW505701. Drawing on the extensive calendar expertise it has acquired since introducing the perpetual calendar almost four decades ago, IWC now pushes the boundaries once again with its first secular perpetual calendar. In addition to recognising the different lengths of the months and adding a leap day every four years, the Portugieser Eternal Calendar also takes into account the Gregorian calendar’s complex leap-year exception rules. A newly engineered 400-years gear ensures that the calendar automatically skips three leap years over four centuries – an event which will occur for the first time in the year 2100. Another key feature of this watch is the extremely precise moon phase display. Thanks to a newly developed reduction gear, the Double Moon phase display will only deviate from the moon’s orbit by one day after 45 million years. The Portugieser Eternal Calendar features an intricately finished platinum case and a black alligator leather strap from Santoni. The extensive use of glass elements such as a glass dial and double box-glass sapphire crystals showcases the ingenious mechanism inside. The increased transparency also creates a unique sense of lightness, airiness and understated elegance.