Strap for Pilot's Watch Spitfire Double Chronograph Stainless Steel / Black / German / Bracelet

The lug width of the IWC Pilot IW3713-36 is 21mm. This measurement refers to the space between the two lugs (attachment points) on the case where the strap connects. It is a specific dimension that characterises this model and accommodates robust, structured straps consistent with the tool watch identity of the Pilot collection.

For the IWC Pilot IW3713-36, alligator leather represents the most fitting choice, aligning with the watch's aviation heritage: regular texture, restrained lustre, and rich patina development. Calf leather is an elegant and more accessible alternative with fascinating natural ageing. Fabric NATO evokes military origins, whilst rubber excels in sports contexts. Shell cordovan offers maximum longevity and distinctive tactile qualities.

To change the strap, use a spring bar removal tool. Position the tool on the small metal spring protruding from the lug ends, gently push it toward the case to release tension, and withdraw the spring bar. Align the new strap with the case lugs and push until the bar clicks into position. For premium leather straps, professional assistance is recommended to prevent damage.

Yes, numerous high-quality aftermarket straps are available for the IWC Pilot IW3713-36, all featuring 21mm lugs. Online at milanostraps.it, a comprehensive selection of compatible straps is available, ranging from premium leathers (alligator, calf, shell cordovan) to fabric and rubber variants. All straps are customisable in length, with many offering stitch colour options.

Leather strap longevity depends on wear intensity, tanning method, and material quality. Quality calf leather typically lasts 3–5 years with moderate daily use, whilst alligator and shell cordovan can exceed 7–10 years due to superior density and durability. Vegetable-tanned leather ensures predictable ageing and gradual wear. To maximise lifespan, rotate multiple straps and avoid prolonged exposure to moisture and direct heat.