Portugieser Eternal Calendar (IW505701)

Special Order at the IWC Schaffhausen Palm Beach Boutique

Call to Order (561)670-2920

• Platinum case
• Automatic, self-winding
• Diameter: 44.4mm
• White dial
• Black alligator leather strap by Santoni
• Strap width: 22mm
• 2-year IWC warranty extendable to 8-years with registration

Highlights: With the Portugieser Eternal Calendar (ref. IW505701), IWC Schaffhausen once again pushes the boundaries in fine watchmaking. The company’s first secular perpetual calendar is based on the same synchronized design as the regular perpetual calendar, meaning all its displays can be advanced via a single crown. The eternal calendar will calculate the leap year correctly until at least 3999, as no official decision has been taken yet as to whether 4000 will be a leap year. Another highlight of this watch is the eternal moon phase display. IWC’s engineers have taken on the develop a moon phase display with unprecedented precision. After calculating many of more than 22 trillion possible combinations, they devised a reduction gear train comprising three intermediate wheels. The Double Moon indication, featuring a titanium base disc with two blue dots and a glass disc rotating above it, will – theoretically – only need an adjustment after 45 million years. The extensive use of glass elements such as a glass dial and double box-glass sapphire crystals showcases the ingenious mechanism. The glass dial is made in an intricate process. In the first step, the underside of the glass is frosted and then lacquered in white. The subdials are machined and polished separately and then placed on the base plate. Finally, the printing is added, and the appliques are mounted by hand. At work inside the polished, brushed and elaborately finished platinum case is the IWC-manufactured 52640 caliber. The automatic Pellaton winding system uses revolutions of the rotor in both directions to build up a power reserve of 7 days (168 hours) in the two barrels. This extraordinary calendar watch is fitted with a black alligator leather strap from Santoni with a platinum folding clasp.