IWC · Pilot

Strap for Pilot's Watch Doppelchronograph Platinum / Blue / English

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
ReferenceIW3713-23
FamilyPilot
MovementIWC caliber 79230 Hours, Minutes, Small Seconds | Date, Day | Chronograph, Rattrapante
CasePlatinum

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 IW3713-23

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Pilot IW3713-23, seen from the bench

The IWC Pilot's Watch Doppelchronograph IW3713-23 is a professional aviation chronograph with a 42mm platinum case and 21mm lug width. It features the caliber 79230 manual-wind movement with a dual-pusher chronograph complication, date, and day functions. Originally developed in the 1940s as a cockpit instrument for military and civil pilots, this model maintains the functional severity and technical reliability that define the Pilot line.

Frequently asked questions

What is the lug width of the IWC Pilot IW3713-23?

The lug width of the IWC Pilot IW3713-23 is 21mm. This measurement is the historical standard for the Pilot family and ensures balanced proportions on the 42mm case. Always verify the measurement before ordering a strap by measuring the internal distance between the two lugs without including the lugs themselves.

Which strap is recommended for the IWC Pilot IW3713-23?

For the platinum case, a slate grey alligator or brown-mahogany shell cordovan is ideal. Alligator maintains a neutral and elegant tone, enhancing the platinum without competing. Cordovan develops a natural golden patina over time. For a sportier context, dark brown vegetable-tanned calf or a 3-colour NATO fabric strap offer an authentic and functional alternative.

How do I change the strap on the IWC Pilot IW3713-23?

To change the strap, you will need a spring bar tool. Position the watch with the dial facing downward, insert the tool's tip into the recess beneath each lug, apply light downward pressure to compress the internal spring, then extract the pin. Repeat for the opposite lug. Proceed in reverse order to mount the new strap. If unsure, entrust the task to a specialised workshop.

Can I use a quality aftermarket strap on this IWC?

Yes, absolutely. A quality aftermarket strap made by certified artisans (such as those available in 21mm size) is perfectly compatible. The key is respecting the 21mm lug width, choosing noble materials, and ensuring the fitting is performed by a professional. Artisan quality often surpasses OEM in terms of patina and ageing characteristics.

How long does a leather strap last on a regularly worn watch?

A quality leather strap, whether vegetable-tanned or shell cordovan, typically lasts 18-36 months of daily continuous wear, depending on exposure to humidity and perspiration. The patina that forms is desirable and follows the natural ageing of the leather. Proper conditioning with specific balms and rotation among several straps (3-4 alternated) substantially extends overall longevity.

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.

Request an appointment →

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