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IWC · Pilot

Strap for ilot's Watch Performance Chronograph Perpetual Calendar Digital Date-Month Ceratanium / Black / Bracelet

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

21mm
21 mm strapsAll IWC
Lug width21 mm
Case diameter43 mm
ReferenceIW3888-01 (aka: IW388801)
FamilyPilot
MovementIWC caliber 89802 hours, minutes, small seconds | big date, leap year, month, perpetual calendar, date | Chronograph, Flyback
Year2025
CaseCeramic, Ceratanium

Spring bar

Swiss Standard universal spring bars

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

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Straps for the Pilot IW3888-01 (aka: IW388801)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Pilot IW3888-01 (aka: IW388801), seen from the bench

The IWC Pilot ref. IW388801 integrates the automatic caliber 89802 with perpetual calendar, flyback chronograph and big date complications. The watch features leap year, month and small seconds indications in addition to the chronograph functions. The lugs measure 21mm in width.

Frequently asked questions

What is the exact lug width of the IWC Pilot IW3888-01?

The lug width of the Pilot's Watch Chronograph Top Gun Ceramic IW3888-01 is 21mm. This measurement represents the vertical distance between the two lugs that house the strap inside the case. Always measure with a digital calliper positioned perpendicularly to the internal channel for precision.

Which strap is best suited for the Pilot IW3888-01?

The Pilot IW3888-01 pairs excellently with straps in brown alligator, vegetable-tanned calf in burgundy, or military-grade NATO fabric. Your choice depends on intended use: alligator for avionic elegance, calf for natural patina evolution over time, NATO for practicality and tradition.

How do you change the strap on an IWC Pilot watch?

Strap replacement requires: extraction of both spring bars using a dedicated tool, insertion of the new strap's holes, and pressure on the spring bar until an audible click secures it. If inexperienced, consult a specialist atelier such as Casati Milano to avoid case damage.

Which aftermarket straps are compatible with the IW3888-01?

Any strap measuring 21mm in lug width is compatible with the IW3888-01. MilanoStraps offers a complete selection of 21mm straps in natural leather, NATO, rubber, and synthetic materials, customizable in length and finishing options.

How long does a leather strap last on a Pilot IW3888-01?

A premium natural leather strap lasts 3-5 years with regular use, depending on frequency of wear, ambient humidity, and maintenance. Alligator and cordovan offer greater longevity. Casati Milano guarantees 18 months on bespoke straps with replacement if necessary.

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