IWC Big Pilot's Watch Perpetual Calendar ProSet Le Petit Prince — 18K 5N Gold (Ref. IW329602): Olive Green Meets Rose Gold
Watches2 min readApr 16, 2026

IWC Big Pilot's Watch Perpetual Calendar ProSet Le Petit Prince — 18K 5N Gold (Ref. IW329602): Olive Green Meets Rose Gold

The precious-metal ProSet perpetual calendar: 42mm in 18-carat 5N rose gold with an olive green dial and buffalo leather strap. Calibre 82665 with bidirectional QP. Applied gold indices. CHF 54,200.

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Description

The third ProSet expression takes the luxury route: a 42mm case in 18-carat 5N rose gold — IWC's signature warm gold alloy of 75% pure gold and 25% copper — paired with a rich olive green dial. This is the dress-watch interpretation of the revolutionary bidirectional perpetual calendar.

Design

The olive green dial is a masterful complement to the warm tones of the 5N gold case. Applied gold indices and numerals filled with Super-LumiNova replace the printed markings of the steel and ceramic versions, elevating the refinement. Gold-plated hands add warmth, and the olive green buffalo leather strap with 18K 5N gold pin buckle completes the classic look. The sapphire caseback shows the calibre 82665 with gold-plated Little Prince rotor.

Specifications

  • Reference: IW329602
  • Case: 18-carat 5N gold (rose gold), 42mm diameter, 14mm thick
  • Water resistance: 100m (10 bar)
  • Movement: IWC calibre 82665 (in-house, automatic)
  • Frequency: 28,800 vph (4 Hz)
  • Power reserve: 60 hours
  • Complications: ProSet perpetual calendar (day, date, month, 4-digit year, moon phase)
  • Moon phase accuracy: 1 day in 1,040 years
  • Dial: Olive green
  • Indices: Applied 18K 5N gold with Super-LumiNova
  • Strap: Olive green buffalo leather with 18K 5N gold pin buckle
  • Price: CHF 54,200

What's Exciting About This Watch

Green and gold is the color combination that keeps winning in modern watchmaking, and IWC has nailed it here. The applied gold indices elevate this over the ceramic and steel versions in terms of finishing. And underneath that luxurious exterior sits the same revolutionary ProSet mechanism — bidirectional perpetual calendar adjustment through the crown alone. At CHF 54,200, it competes favorably against other gold perpetual calendars on the market, most of which lack the ProSet convenience.

History

5N gold has been IWC's signature warm gold alloy for years. The olive green dial trend in luxury watchmaking has been building since 2020, and IWC's execution here feels mature rather than trend-chasing. The ProSet technology in a precious metal case signals IWC's confidence that this mechanism is their new standard for perpetual calendars going forward.

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