Strap for Pilot's Watch Spitfire Chronograph Laureus

The lug width of the IWC Pilot IW3717-12 is 21 millimetres. This dimension is measured by calculating the external distance between the two metal lugs on either side of the case. It is essential to verify this measurement before ordering a strap, as an incorrect size (20 or 22 millimetres, which are more common) would result in incompatibility.

The ideal strap depends on the intended use. For formal contexts and civil aviation, we recommend alligator in brown tones or vegetable-tanned calf leather. For military and operational environments, a NATO strap in grey or black ensures functionality and practicality. FKM rubber is ideal for intensive chronograph use and aquatic environments. The buckle or deployant clasp should be in satin-finished steel to match the case.

The strap is replaced by removing the spring bars using a dedicated tool. Insert one end of the spring bar removal tool into the space between the case and the strap, push the bar inward, remove the old strap, and thread the new one into place. Ensure both spring bars are correctly positioned and that the strap sits flush against the lugs without play.

Yes, provided the lug width is precisely 21 millimetres. Many artisanal strap makers produce custom-made straps for this specific dimension. We recommend always verifying the technical specifications and consulting manufacturers who guarantee compatibility with vintage Pilot models to ensure a perfect fit without play or tension.

A quality leather strap (alligator or vegetable-tanned calf) has an average lifespan of 3 to 5 years with daily use, developing a rich and characteristic patina during this period. Longevity depends on the tanning method, frequency of use, exposure to moisture, and maintenance level. A NATO strap in canvas resists 5-7 years before showing visible wear. Rubber has a shorter lifespan, approximately 2-3 years, before losing elasticity.