IWC Portugieser Perpetual Calendar - Moonphase - Rose Gold - 44.2 MM - Blue Dial - IW503312

IWC’s perpetual calendar, conceived by Kurt Klaus in the 1980s, automatically adjusts for varying month lengths and leap years, requiring only simple crown adjustments. The mechanical program remains accurate until 2100 without manual correction. The Portugieser Perpetual Calendar showcases calendar functions across four sub-dials, including date, weekday, month, moon phase, and a four-digit year display, complemented by a power reserve indicator. This special edition boasts a maritime-inspired design, exclusively available at IWC boutiques and online. Encased in 18-carat Armor Gold®, with a blue dial and gold-plated hands and appliqués, it houses the IWC-manufactured 52610 calibre. Its Pellaton winding system, enhanced with ceramic components, offers a 7-day power reserve from twin barrels. The meticulously decorated movement, along with an 18-carat gold rotor, is visible through the sapphire glass case back, embodying both technical prowess and aesthetic refinement.