IWC · Pilot

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

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
ReferenceIW3713-24 (aka: IW371324)
FamilyPilot
MovementIWC caliber 79230 hours, minutes, small seconds | date, day | Chronograph, Rattrapante
Year1996 - 2005
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 IW3713-24 (aka: IW371324)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Pilot IW3713-24 (aka: IW371324), seen from the bench

The IWC Pilot ref. IW371324 is powered by the 79230 caliber with functions of hours, minutes, small seconds, date, day of the week and split-seconds chronograph. The watch features 21mm lugs and derives from the brand's aviation heritage. The movement offers the split-seconds chronograph complication for the measurement of intermediate times.

Frequently asked questions

What is the lug width of the IWC Pilot IW3713-24?

The lug width of the IWC Pilot IW3713-24 is 21mm. This measurement is specific to this model and represents the ideal design proportion between the 42mm case and the lugs. When measuring your strap, position the measurement between the inner lug shoulders where the strap sits, not on the outer lug tip. Many owners mistakenly order 20mm straps, which fit too tightly against the case profile.

What is the best strap choice for the platinum IWC Pilot IW3713-24?

For the Pilot IW3713-24 in platinum, we recommend vegetable-tanned alligator in dark brown or black. The natural texture of the grain complements the satin finish of the platinum case perfectly, maintaining a sober aesthetic whilst developing a rich patina over time. Alternatively, burgundy shell cordovan or tobacco-aged calf leather provides visual warmth that balances the cool tone of platinum. For active pursuits, an FKM rubber strap with stainless steel deployant clasp maintains functional integrity without compromising the platinum case.

How do you change a strap on a 21mm lug width watch?

Strap replacement involves removing the spring bars that connect the strap to the lugs. Position yourself in good light and use a dedicated spring bar tool, applying gentle upward pressure from underneath one spring bar. The strap will disengage smoothly. To install a new strap, align the lug hole with the spring bar and press gently until you feel the click of engagement. Always work on a soft cloth surface to avoid scratching the platinum case.

Are aftermarket straps compatible with the Pilot IW3713-24?

Yes, any strap with a 21mm lug width is mechanically compatible with the Pilot IW3713-24. However, we recommend selecting high-quality straps from specialist craftspeople, as a platinum case deserves proportionate construction integrity. All straps on milanostraps.it are compatibility-tested and handcrafted from premium hides—alligator, shell cordovan, and vegetable-tanned calf—ensuring durability and authentic patina development over time.

How long does a natural leather strap last on a daily-wear watch?

A high-quality vegetable-tanned leather strap typically lasts 2-4 years with daily wear, provided proper care is observed. Alligator and shell cordovan, owing to their natural density, generally outlast calf leather. Constant exposure to perspiration, moisture, and sunlight accelerates ageing. To extend lifespan, rotate between multiple straps, allow complete air-drying after moisture exposure, and apply specialist leather conditioner occasionally. Many owners prefer replacing their strap every 2-3 years as part of routine maintenance, welcoming the opportunity to refresh their watch's visual identity.

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