IWC
Pilot IW3718-13 (aka: IW371813)— lug 20mm

The IWC Pilot IW3718-13 (aka: IW371813) features a 20mm lug width. This dimension was designed to ensure perfect visual balance between the 44mm case and the bracelet, maintaining the characteristic proportions of the pilot watch. It is essential to measure the lug width correctly using a caliper, positioning it between the two inner edges of the case terminal, to ensure complete compatibility of replacement straps.

The choice depends on your intended use and dial version. For a formal-elegant look, we recommend a strap in alligator or calf leather in cognac brown, smoke grey, or black tones. If you prefer everyday versatility, a NATO fabric strap or modern vulcanized rubber offer practicality and durability. Alligator enhances the professional pilot character, while calf emphasizes the functionalist elegance of the design. Our craftsmen can personalize every option in precise measurements and your choice of stitching thread.

The IWC Pilot IW3718-13 (aka: IW371813) uses a standard spring bar attachment system for the short lug. To change the strap: 1) Obtain a spring bar tool or dedicated thin instrument; 2) Position the watch on a soft surface with the lug side facing upward; 3) Gently push the spring bar inward from the opposite side using the tool; 4) Once extracted, insert the new 20mm strap into the lug and reinsert the spring bar until you hear the safety click. For critical operations, we recommend expert assistance.

Absolutely. The 20mm lug width of the IWC Pilot IW3718-13 (aka: IW371813) is compatible with high-quality aftermarket straps provided they strictly respect the 20mm width and attachment thickness specifications. On Milano Straps we offer a wide selection of customizable handcrafted 20mm straps in premium materials such as alligator, crocodile, and calf, guaranteeing construction standards that make no compromises. For complete consultative experience, the Casati Milano atelier can create a custom strap based on your aesthetic and functional needs.

The lifespan of a leather strap depends on usage intensity, climate conditions, and craftsmanship quality. A natural leather strap of artisanal quality (alligator, crocodile, calf) on a 44mm watch like the IW371813, subjected to moderate daily use, maintains integrity and aesthetics for approximately 3-5 years. With frequent exposure to humidity or direct sunlight, the natural patina accelerates, though this is part of the appeal of authentic leather. A NATO or rubber strap offers greater resistance to external elements. Straps made by Casati Milano are guaranteed for 18 months and can be serviced or regenerated upon request.