IWC Schaffhausen Iw505701 Portugieser Eternal Calendar

The IWC Schaffhausen Iw505701 Portugieser Eternal Calendar is recognized as a technical milestone for its 400-year secular perpetual calendar, which will not require adjustment until 3999, and its moon phase complication accurate for 45 million years. Owners note its suitability for daily wear, complementing suits, and its appeal to affluent individuals. The watch features calendar sub-dials made of sapphire crystal that appear to float above the dial, creating an elegant and airy aesthetic. Some owners question the practicality of its calendar functions beyond the year 2299. The 44.4mm platinum case has a water resistance of 5 bar. The automatic Caliber 52640 movement provides a seven-day power reserve. On balance, owners and reviewers highly regard the IWC Schaffhausen Iw505701 Portugieser Eternal Calendar for its groundbreaking calendar complication and sophisticated dial design.