Get to know more about our IWC Portugieser Eternal Calendar (Ref. IW505701) Watch

🔗 https://watches.iwc.com/efa3f1 Translating the irregular calendar into a mechanical program for a wristwatch remains one of the most challenging engineering feats in fine watchmaking. Our Portugieser Eternal Calendar, on the other hand, is mechanically programmed to take these complex nuances into account. It will calculate the leap year correctly until at least the year 3999, as it has not yet been officially decided whether the year 4000 will be a leap year or not. 📷 Ref. IW505701 Discover our collection here: App: https://apps.apple.com/us/app/iwc-schaffhausen-app/id1558418880 Journal: https://www.iwc.com/en/articles/journal Facebook: https://www.facebook.com/iwcwatches Instagram: https://www.instagram.com/iwcwatches LinkedIn: https://www.linkedin.com/company/iwc-schaffhausen TikTok: https://www.tiktok.com/@iwcwatches Pinterest: https://www.pinterest.de/iwcwatches/ #IWCportugieser | #IWCwatches | #ProudlyMadeInSchaffhausen