IWC Portugieser Eternal Calendar in Guinness World Records as the “most precise lunar phase wristwatch” | SENATUS

ASIA'S PREMIER LUXURY & LIFESTYLE MAGAZINE

SENATUS.NET

IWC Portugieser Eternal Calendar in Guinness World Records as the “most precise lunar phase wristwatch”
By SENATUS Editor | 24 July 2024

The newly introduced IWC Portugieser Eternal Calendar has been officially recognised by Guinness World Records as the “most precise lunar phase wristwatch”.

With a theoretical deviation of just one day in 45,361,055 years, the Double Moon™ indication of the Portugieser Eternal Calendar beats the previous world record by more than 43 million years.

This is made possible by a new reduction gear train with three intermediate wheels, which reduces the duration of one calendar month as precisely as possible to the duration of one complete lunar cycle.

1 Photo | View Photos

Watches & Jewelry

IWC releases Ingenieur Automatic 42 in black ceramic - Watches & Wonders 2025 #WatchesandWonders2025

Watches & Jewelry

IWC releases Ingenieur Automatic in 35 mm size - Watches & Wonders 2025 #WatchesandWonders2025

Watches & Jewelry

IWC celebrates 'The Little Prince' with a celestial tribute in blue and gold - Big Pilot’s Watch Perpetual Calendar Tourbillon Le Petit Prince

Watches & Jewelry

Time across borders: Longines marks a century of Zulu Time with a rose-gold bezel tribute

Watches & Jewelry

The Rope Watch: Tiffany & Co.’s first solar-powered movement

Watches & Jewelry

Chaumet pop-up at The Avenues Mall in Kuwait

Watches & Jewelry

Tiffany & Co.new store in Milan is largest in Europe

Watches & Jewelry

IWC Big Pilot’s Watch Shock Absorber Tourbillon Skeleton XPL - where extreme engineering meets the poetry of haute horlogerie

All Rights Reserved. SENATUS © 2025
 

SENATUS is a registered trademark of SENATUS PTE LTD. The material on this site may not be reproduced, distributed, transmitted, cached or used otherwise, except as expressly permitted in writing by SENATUS.