IWC · Big Pilot

Strap for Big Pilot Perpetual Calendar Red Gold / Red Gold

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
Lug width20 mm
Case diameter46 mm
ReferenceIW5026-39 (aka: 5026-39, IW502639)
FamilyBig Pilot
MovementIWC caliber 51564 hours, minutes, small seconds | date, day, month, perpetual calendar, year indicator | moonphase
Year2012 - 2013
CaseRed Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Big Pilot IW5026-39 (aka: 5026-39, IW502639)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Big Pilot IW5026-39 (aka: 5026-39, IW502639), seen from the bench

The IWC Big Pilot IW5026-39 features a 46.20mm red gold case housing the complex IWC 51564 calibre with perpetual calendar, year indicator, moon phases, and day-date-month subdials. The watch has a 20mm lug width, black dial with luminous Arabic numerals, oversized crown, sapphire caseback, and 100 meters water resistance. This red gold version transforms the technical tool watch into a luxury statement while maintaining its aviation heritage from the 1940s Luftwaffe instrument origins.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only