IWC · Pilot

Strap for Pilot's Watch Mark XV Stainless Steel / White / Strap

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

19mm
Lug width19 mm
Case diameter38 mm
ReferenceIW3253-09 (aka: 3253-09, IW325309)
FamilyPilot
MovementIWC caliber 37524 Hours, Minutes, Seconds, World Time | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Pilot IW3253-09 (aka: 3253-09, IW325309), seen from the bench

The IWC Pilot reference IW3253-09 is powered by the IWC caliber 37524 with functions of hours, minutes, seconds, world time, and date. The movement offers indications for the main international time zones through an integrated world time system. The lugs measure 19mm in width for the strap.

Frequently asked questions

What is the correct lug width for the IWC Pilot IW3253-09?

The lug width of the IWC Pilot IW3253-09 is 19mm. This is a non-standard dimension that requires straps built to specific custom specifications. To verify accuracy, measure the space between the two lateral lugs of the case with a digital caliper. An undersized strap would result in visible lateral play; an oversized strap would not fit correctly into the slot.

What is the best strap material for the Pilot IW3253-09?

For a watch with a technical and avionic vocation like the Pilot, alligator is the most natural choice: the characteristic grain and natural texture dialogue with the black dial while maintaining a patina of refinement. Vegetable-tanned calf offers pronounced texture and a patina that evolves rapidly with use. Shell cordovan, for purists, guarantees density and natural water resistance. Synthetic straps are discouraged as they reduce the tool-watch to pure functionality.

How do I change the strap on the IWC 3253-09?

On the case of the Pilot IW3253-09 there are two lateral lugs. Using a spring bar tool (or equivalent tool), insert the tip into the small slot at the base of the inner lug. Apply gentle and constant pressure until the spring bar pin emerges. Repeat for the other side. Verify that the new strap is 19mm wide, otherwise it will not install correctly. Reinsert the pins and ensure the strap is secure before use.

Is the original strap of the Pilot IW3253-09 compatible with aftermarket straps?

Yes, the Pilot IW3253-09 accepts any aftermarket strap of 19mm width. The spring bar pins are standard and reusable. Always verify that the width is exact: 18mm or 20mm straps will not fit into the slot. Artisanal straps are crafted with millimetric tolerances specific to this reference.

How long does a natural leather strap last on the Pilot IW3253-09?

The lifespan of a natural leather strap varies based on material, use, and environmental conditions. An alligator or shell cordovan strap, with ordinary maintenance, guarantees 5-8 years of daily use. Vegetable-tanned calf, softer and subject to accelerated patina, maintains structural integrity for 4-6 years in civilian use. All straps benefit from an 18-month warranty against manufacturing defects. Protecting the leather from excessive moisture and direct sunlight significantly extends useful life.

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