IWC · Pilot

Strap for Pilot's Watch Spitfire UTC Stainless Steel / Silver / Strap

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
ReferenceIW3251-09 (aka: IW325109)
FamilyPilot
MovementIWC caliber 30710 Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable) | Date
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 IW3251-09 (aka: IW325109)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Pilot IW3251-09 (aka: IW325109), seen from the bench

The Pilot IW3251-09 in platinum embodies IWC's aeronautical heritage with a 39mm case, automatic caliber 3051 with 24-hour GMT function, and 11.3mm thickness. The platinum case features a deep blue dial with white gold applied indices, screw crown, and sapphire crystal resistant to water up to 60 meters. This timepiece requires a 20mm lug width strap for optimal proportions between the 39mm diameter and wrist circumference.

Frequently asked questions

What is the lug width of the IWC Pilot IW3251-09?

The lug width of the IWC Pilot IW3251-09 is 20 millimeters. It is measured from the center of the left lug to the center of the right lug. All straps for this model must feature this exact dimension, with a slight taper towards the buckle to accommodate the case geometry.

Which strap is best suited for the IWC Pilot IW3251-09 in platinum?

For an IWC Pilot IW3251-09 in platinum, we recommend genuine alligator in black or navy blue: the regular grain and silky hand create a balance between discreet luxury and functionality. Brown mahogany shell cordovan represents a sophisticated alternative, with a patina that develops over time. For sporty use, anthracite FKM rubber maintains the instrument-like character of the model.

How do you change the strap on the IWC Pilot IW3251-09?

The strap is changed using a spring bar tool. Insert the pin into the lateral slot of the lug, press gently downward to release the internal spring, and the strap will come free. Proceed with caution to avoid scratching the platinum case. When inserting the new strap, ensure the pin clicks securely into both lugs.

Can I use an aftermarket 20mm strap on an IWC Pilot IW3251-09?

Yes, all straps with a 20mm lug width are compatible with the IWC Pilot IW3251-09. However, to ensure optimal fit and protect the platinum case from scratches, we recommend bespoke straps built specifically for this dimension, such as those by Casati Milano, which include an internal rubber pass-through to facilitate installation.

How long does a leather strap last on the IWC Pilot IW3251-09?

A genuine leather strap (alligator, cordovan, vegetable-tanned calf) typically lasts 5-7 years with daily use, provided adequate maintenance: protect from prolonged sun exposure, avoid direct contact with salt water, occasionally apply leather balms. Casati Milano provides an 18-month warranty on all straps and offers wear replacement services.

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