IWC · Pilot

Strap for Pilot's Watch Doppelchronograph Stainless Steel / Black / German / Bracelet

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

Lug width

21mm
Lug width21 mm
Case diameter42 mm
ReferenceIW3711-17 (aka: IW371117)
FamilyPilot
MovementIWC caliber 79230 hours, minutes, small seconds | date, day | Chronograph, Rattrapante
Year1993 - 1995
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Pilot IW3711-17 (aka: IW371117)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Pilot IW3711-17 (aka: IW371117), seen from the bench

The Pilot IW371117 is equipped with the IWC caliber 79230, a chronograph movement with a rattrapante function that displays hours, minutes, small seconds, date and day of the week. The watch features 21mm lugs and belongs to the IWC Pilot collection dedicated to aviation. The rattrapante chronograph allows the measurement of intermediate times through a second independent seconds hand.

Frequently asked questions

What is the lug width of the IWC Pilot IW3711-17?

The lug width of the IWC Pilot IW3711-17 is 21 millimetres. This aeronautical standard permits the use of robust and structured watch straps, fully compatible with the catalogue of European artisanal strap makers. Measurement must be taken perpendicular to the line connecting the two lugs, on the interior side of the case.

Which strap is most suitable for the IWC Pilot IW3711-17?

For the Pilot IW3711-17 we recommend alligator in dark blue or brown coloration for aesthetic compatibility with the dial, or calf leather in vegetable tanning that develops patina over time. Alternatively, vulcanised rubber or vintage NATO fabric offer more informal solutions without compromising the seriousness of the timepiece.

How do I change the strap on my IWC Pilot IW3711-17?

Changing the strap requires the use of a dedicated tool (spring bar tool) to extract the lugs that connect the strap to the case. Place the watch on a soft surface, locate the two lugs at the extremities of the lug width, apply the tool to the lug groove and gently extract downwards. Repeat for the second lug, then insert the new strap.

Can I use aftermarket straps for the IWC Pilot IW3711-17?

Yes, provided they respect the 21 millimetre lug width. Artisanal quality straps built to European standards are 100% compatible and often offer superior finishes and materials to the OEM product. We recommend vegetable-tanned leathers and fixed-passant constructions to guarantee wrist stability.

How long does a leather strap last on the IWC Pilot IW3711-17?

An artisanal quality leather strap has an average lifespan of 4-6 years under normal conditions, depending on frequency of use, sun exposure and ambient humidity. Vegetable-tanned leathers maintain superior resilience over time. Proper maintenance and rotation between multiple straps significantly extends the life of each individual piece.

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