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IWC Schaffhausen pushes the boundaries of what is possible in horological complications with the Portugieser Eternal Calendar
<figure id="attachment_105223" aria-describedby="caption-attachment-105223" style="width: 1600px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="size-full wp-image-105223" src="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer.jpg" alt="" width="1600" height="1878" srcset="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer.jpg 1600w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-256x300.jpg 256w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-872x1024.jpg 872w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-768x901.jpg 768w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-1309x1536.jpg 1309w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-1568x1840.jpg 1568w" sizes="(max-width: 1600px) 100vw, 1600px" /><figcaption id="caption-attachment-105223" class="wp-caption-text">The IWC Portugieser Eternal</figcaption></figure>
Since its establishment in 1868 by American watchmaker and engineer Florentine Ariosto Jones, IWC Schaffhausen has earned a reputation for its distinctive watchmaking approach and for seamlessly blending traditional craftsmanship and creativity with cutting-edge technology and manufacturing processes. Of particular note, IWC’s artisanship is not confined solely to unique or limited-edition pieces, as the Swiss luxury watch brand also showcases its horological expertise across the entire spectrum of watches, from elegant dress watches to sporty models.
A definite exemplar of IWC Schaffhausen’s watchmaking philosophy would be the new Portugieser Eternal Calendar. This piece is the brand’s first secular perpetual calendar, boasting a moon-phase complication with an astonishing 45-million-year accuracy. IWC has continuously refined the precision of its perpetual calendar mechanism over the past four decades. The journey began in 1985 with Kurt Klaus’ Da Vinci Perpetual Calendar Chronograph (Ref. IW3750), which featured a moon-phase indicator that remains accurate for 122 years. This pursuit of precision took a significant leap forward in 2003 with the Portugieser Perpetual Calendar (Ref. 5021), which achieved an accuracy rate of 577.5 years.
<figure id="attachment_105221" aria-describedby="caption-attachment-105221" style="width: 1600px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="size-full wp-image-105221" src="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer.jpg" alt="" width="1600" height="1200" srcset="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer.jpg 1600w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer-300x225.jpg 300w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer-1024x768.jpg 1024w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer-768x576.jpg 768w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer-1536x1152.jpg 1536w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-400yrs-FILEminimizer-1568x1176.jpg 1568w" sizes="(max-width: 1600px) 100vw, 1600px" /><figcaption id="caption-attachment-105221" class="wp-caption-text">IWC’s 52640 calibre used in the Portugieser Eternal Calendar</figcaption></figure>
And now, the new Portugieser Eternal Calendar clearly sets a new benchmark. Chris Grainger-Herr, CEO of IWC Schaffhausen, notes: “Since Kurt Klaus developed his legendary perpetual calendar in the 1980s, IWC Schaffhausen has accumulated unique expertise in mechanical calendars that are ingeniously efficient in their design and easy to use. With the new Portugieser Eternal Calendar, we now venture further than ever before, touching the limits of eternity.”
The watch’s gorgeous and incredibly accurate moon-phase display on the glass dial is the crowning glory. With its intriguing depiction of the moon’s celestial dance, the moon-phase display is arguably one of the most fascinating complications in watchmaking. Even when cloud cover obscures our view of the heavens, the dial indicates the moon’s current phase, ensuring no full moon is missed.
<figure id="attachment_105222" aria-describedby="caption-attachment-105222" style="width: 1600px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="size-full wp-image-105222" src="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer.jpg" alt="" width="1600" height="1200" srcset="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer.jpg 1600w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer-300x225.jpg 300w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer-1024x768.jpg 1024w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer-768x576.jpg 768w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer-1536x1152.jpg 1536w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-ptg-5057ec-glass-FILEminimizer-1568x1176.jpg 1568w" sizes="(max-width: 1600px) 100vw, 1600px" /><figcaption id="caption-attachment-105222" class="wp-caption-text">Construction of the case</figcaption></figure>
Taking this idea to a whole new level, the Portugieser Eternal Calendar has a Double Moon indication, which depicts the moon in the Northern and Southern hemispheres, on the dial. The display consists of two super-imposed discs. A celestial disc with two small, circular openings rotates above an immobile lower disc with two dots, giving the impression that two small moons are waxing or waning. The lower disc is made of titanium and decorated with a guilloché pattern, while the upper disc is made of glass.
In addition to its remarkable movement, the Portugieser Eternal Calendar is an incredibly charming watch. Housed in a platinum case with polished and brushed surfaces, the newly developed IWC-manufactured 52640 calibre features a highly efficient Pellaton winding system and boasts a power reserve of up to seven days (168 hours). “Our first secular perpetual calendar automatically takes into account the Gregorian calendar’s complex leap-year exception rules by skipping the leap year three times over 400 years. True to the spirit of engineers who are always pushing the boundaries, we have also fitted this technical marvel with a moon phase display that will only deviate from the moon’s orbit by one day after 45 million years,” Chris Grainger-Herr elaborates.
<figure id="attachment_105223" aria-describedby="caption-attachment-105223" style="width: 1600px" class="wp-caption aligncenter"><img loading="lazy" decoding="async" class="size-full wp-image-105223" src="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer.jpg" alt="" width="1600" height="1878" srcset="https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer.jpg 1600w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-256x300.jpg 256w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-872x1024.jpg 872w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-768x901.jpg 768w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-1309x1536.jpg 1309w, https://backend.daman.co.id/wp-content/uploads/2024/10/iwc-iw505701-FILEminimizer-1568x1840.jpg 1568w" sizes="(max-width: 1600px) 100vw, 1600px" /><figcaption id="caption-attachment-105223" class="wp-caption-text">The IWC Portugieser Eternal</figcaption></figure>
Further adding a touch of gravitas to the Portugieser Eternal Calendar, Guinness World Records has officially recognized the watch as the “world’s most precise lunar phase wristwatch.”
This work of art pushes the limits of what is possible in watchmaking and represents IWC Schaffhausen’s commitment to innovation and perfection. For those who value the craft of watchmaking, the watch is an everlasting masterpiece that will be treasured for decades and centuries to come.

Perpetual Perfection: the IWC Schaffhausen Portugieser Eternal Calendar

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Portugieser Eternal Calendar