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

The lug width of the IWC Pilot IW3713-34 is precisely 21mm. This measurement, determined by the distance between the lugs on the case, is specific to this model and allows no variation. To verify it, simply remove the current strap and measure the space between the two lugs using a calliper or precise ruler.

The ideal material depends on intended use. For formal elegance, alligator leather in vegetable tanning with dark brown colour maintains visual coherence with the black dial of the case. For daily sportiness, full-grain calf leather resists wear better; for bolder contexts, shell cordovan offers a patina that ennobles over time. FKM rubber is recommended for humid environments or intensive summer use.

The strap is replaced by removing the two pins (a pin removal tool, easily available) that pass through the lugs on the case. Gently push the pin from one side until it is completely extracted, then remove the old strap and insert the new one by aligning the holes with the lugs. Reinsert the pins carefully, verifying that the strap is securely fastened before wearing the watch again.

Yes, provided the strap is specifically constructed for a 21mm lug width. High-quality artisanal aftermarket straps often offer superior construction compared to original straps in terms of materiality and finish. It is important to verify that the lugs conform to IWC specifications and that the leather thickness does not obstruct the installation of the pins.

Durability depends on material and intensity of use. Quality artisanal alligator or calf leather, subject to proper care (avoiding prolonged moisture, periodic cleaning with specific products), guarantees 3-5 years of daily use before requiring regeneration. Shell cordovan, thanks to its intrinsic density, can exceed 7 years. FKM rubber has a longevity of 4-6 years before beginning to lose elasticity.