The moon phase display on the Portugieser Perpetual Calendar maintains remarkable accuracy, deviating by just 1 day in 577.5 years from the actual phase of the moon. This elegant timepiece offers an array of features, including a perpetual calendar, a four-digit year display window, and a 7-day automatic movement with Pellaton winding. Adorning the silver-plated dial are four subdials presenting the moon phase, date, month, day, power reserve, and small seconds. Powered by an IWC-manufactured movement from the 52000-calibre family, it boasts a solid 5N gold rotor and blued screws. Encased in 18-carat 5N gold with an arched-edge front glass, it is paired with a luxurious dark brown alligator leather strap, epitomizing sophistication and timeless style.