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IWC · Pilot

Strap for Pilot's Watch Chronograph 41 Stainless Steel / Blue

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

Lug width

20mm
20 mm strapsAll IWC
Lug width20 mm
Case diameter41 mm
ReferenceIW3881-01 (aka: IW388101)
FamilyPilot
MovementIWC caliber 69385 hours, minutes, small seconds | date, day | Chronograph, column wheel
Year2021
CaseStainless Steel

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 IW3881-01 (aka: IW388101)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Pilot IW3881-01 (aka: IW388101), seen from the bench

The IWC Pilot's Watch Chronograph IW3881-01 features a 41mm stainless steel case housing the automatic IWC caliber 69385 movement with column-wheel chronograph, date and day display. The black satin dial is legible with applied indices and luminescent hands, while the transparent caseback reveals the movement. Water resistance is ensured by a screw-down crown. The watch has a 20mm lug width and delivers 44 hours of power reserve.

Frequently asked questions

What is the exact lug width of the IWC Pilot IW3881-01?

The lug width of the IWC Pilot IW3881-01 measures precisely 20 millimetres. This specification ensures compatibility with all bespoke straps designed for the 20mm measurement, encompassing premium leather variants and technical textile options alike.

Which strap do you recommend for the IWC Pilot IW3881-01?

We recommend shell cordovan or alligator straps for formal occasions, smooth or medium-grained calfskin for daily wear, and NATO or rubber straps for sporting contexts. Selection hinges upon achieving the desired balance between formal aesthetic and functional practicality.

How do I change the strap on the IWC Pilot IW3881-01?

Strap replacement is accomplished by removing the lug pins using a spring bar tool or via a qualified watchmaker. The procedure requires minimal time and poses no risk to the case. For bespoke straps, Casati Milano provides detailed photographic instructions via WhatsApp.

Can I use an aftermarket strap on this IWC?

Yes, provided the lug width is precisely 20mm. Compatible straps available on milanostraps.it are validated for this model and offered in numerous colour and material variants, with customisation options for sizing, initials, and stitching thread specification.

How long does a leather strap last on this watch?

A quality leather strap, worn daily, typically remains serviceable for 18–24 months before requiring replacement. Premium materials such as shell cordovan and vegetable-tanned leather age with distinction, developing patina and character over extended use. Casati Milano provides an 18-month warranty on all bespoke straps.

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