IWC Schaffhausen - May 21, 2026

Time fully mastered.

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Total mastery of time, at your fingertips.

With the Perpetual Calendar ProSet, IWC Schaffhausen has tackled the last challenge in calendar design: full forward and backward adjustability through a single crown position. Pull out the crown, turn it forward or backward, and every display – from the date to the moon phase – falls instantly into place. As intuitive as setting the time itself.

Behind that simplicity lies a genuine feat of engineering: unlike previous architectures, the ProSet module is built entirely on gears – allowing adjustments in both directions for the first time – and protected by five patents. And for those who demand lifetime precision: the moon phase display is now accurate to within a day for 1,040 years.

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Big Pilot's Watch Perpetual
Calendar ProSet Le Petit Prince

IW329601

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Big Pilot's Watch Perpetual
Calendar ProSet Le Petit Prince

IW339601

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