IWC · Pilot

Strap for Pilot's Watch Spitfire Chronograph Stainless Steel / Silver / Spanish / Bracelet

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

Lug width

20mm
Lug width20 mm
Case diameter39 mm
ReferenceIW3706-30 (aka: IW370630)
FamilyPilot
MovementIWC caliber 7922 hours, minutes, small seconds | date, day | Chronograph
Year2003 - 2006
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 IW3706-30 (aka: IW370630)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Pilot IW3706-30 (aka: IW370630), seen from the bench

The IWC Pilot IW370630 is powered by the Caliber 7922 with functions of hours, minutes, small seconds, date, day, and chronograph. The watch features 20mm lugs and is part of the brand's aviator collection. The movement offers day of the week indication in addition to the classic chronograph functions.

Frequently asked questions

What is the lug width of the IWC Pilot IW3706-30?

The lug width of the IWC Pilot IW3706-30 is 20 millimetres. This measurement is specific to the model and refers to the internal distance between the two lugs of the case. It is essential to use straps compatible with this measurement to ensure a perfect fit and uniform pressure on the attachments.

What is the best strap for the IWC Pilot IW3706-30?

The ideal strap depends on intended use and aesthetic preferences. For formal contexts, an American alligator with vegetable tanning develops a natural patina over time. For daily wear, an Italian calf with fine grain offers softness and practicality. For those choosing military functionality, a silk and cotton NATO remains the most authentic choice. Finally, an FKM rubber strap is perfect for durability and minimal maintenance.

How do I change the strap on my IWC Pilot IW3706-30?

To change the strap, you need a dedicated tool (spring bar tool). Gently remove the spring bars from the case lugs, extract the old strap, then insert the new strap by aligning the holes with the spring bars and pushing the springs until fully engaged. If you are unsure, consult a professional: the Casati Milano atelier offers this service with precision and warranty.

Are third-party 20mm straps compatible with the IWC Pilot IW3706-30?

Yes, any artisanal strap with a 20-millimetre lug width is compatible with your IWC Pilot IW3706-30. The artisanal straps available online at milanostraps.it are constructed to this specification and customisable in terms of length, buckle type (deployante or standard buckle) and details such as initials.

How long does a natural leather strap last on the IWC Pilot IW3706-30?

The lifespan of a leather strap depends on the quality of construction, type of leather and usage. An alligator or calf with vegetable tanning, if conditioned regularly and protected from excessive moisture, lasts between 3 and 5 years of daily wear. A shell cordovan strap, given its natural density, can exceed 7 years. The Casati Milano atelier offers an 18-month warranty on construction.

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