Big Pilot's Watch Perpetual Calendar ProSet Le Petit Prince (Ref. IW329601) @iwcwatches

Uploaded May 2026 | Updated September 2026, 2 weeks ago

The Big Pilot's Watch Perpetual Calendar ProSet Le Petit Prince (Ref. IW329601) integrates our new forward- and backward-adjustable Perpetual Calendar ProSet into the state-of-the-art IWC 82665 calibre, visible through the sapphire glass case back of the timepiece.

This groundbreaking module, entirely based on gears, is protected by five patents. A smart mechanical program adjusts the month lengths according to the intricate rhythm of the Gregorian calendar, via a complex geometry arranged across several functional layers within the program wheel.

A gold-plated medallion depicting the Little Prince on his asteroid decorates the rotor of the automatic winding system, while the completely re-engineered Perpetual Calendar ProSet module can also be admired through the sapphire glass case back.

Discover more: ms.spr.ly/6055vTALW

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