Atributetoeternity.

Front shot image of IWC Portugieser Eternal Calendar with white dial, platinum case and black alligator leather strap by Santoni.

Mechanically programmed to account for the Gregorian calendar’s complex leap year exceptions, the Portugieser Eternal Calendar is the first secular perpetual calendar from IWC Schaffhausen. This highly sophisticated watch was awarded the prestigious “Aiguille d’Or” at the Grand Prix d’Horlogerie de Geneve in 2024. 

Close up image of IWC Portugieser Eternal Calendar with white dial, platinum case and black alligator leather strap by Santoni.


Back shot image of IWC Portugieser Eternal Calendar with platinum case and black alligator leather strap by Santoni.

52000 calibre family

The IWC-manufactured 52000 calibre family comprises large automatic movements. The highly efficient Pellaton winding system uses movements of the rotor in both directions to build up a power reserve of 168 hours (7 days) in two barrels. Components that are subject to high stresses, such as the automatic wheel and the clicks, are made of virtually wear-free ceramic. 

IW505701 with white dial and black leather strap on a man's wrist

A Tribute to Eternity

An intricate mechanism, reaching further into the future than ever before, capturing the beauty of time and eternity. 

PRODUCT INFORMATION

Side shot image of IWC Portugieser Eternal Calendar with platinum case and black alligator leather strap by Santoni.
Small hacking seconds
Power Reserve 168 hours
Eternal calendar with displays for the date, day, month, year in four digits and eternal moon phase
Rotor with 18-carat gold medallion
front shot of portugieser chronograph with black dial gold case and black leather strap

IWC Portugieser

With its timeless and refined design, the Portugieser blends the elegance of a dress watch with the functional roots of maritime timekeeping and navigation. 

black background image