Strap for Pilot's Watch Spitfire Double Chronograph Stainless Steel / Silver / Spanish / Bracelet

The lug width of the IWC Pilot IW3713-50 is 21mm. This measurement represents the internal distance between the case lugs, measured vertically. It is the sole factory configuration for this reference and corresponds to the optimal proportions of the 42mm pilot case.

The optimal material depends on your intended use. For formal contexts, alligator in vegetable tanning or French calf offer elegance and natural patina over time. For a sporty-aviation approach, a technical rubber strap or NATO in heavy cotton maintain the tool watch character. Shell cordovan is ideal for those seeking unparalleled durability and minimal maintenance.

Acquire a spring bar tool. Place the watch on a soft surface and locate the small metal pins (spring bars) at the sides of the lugs. Insert the tool beneath the pin to release tension, then remove the old strap. Align the new strap with the lug holes, press the pin until the spring clicks into position. Verify that the strap is firmly secured before wearing.

Yes, provided the strap is constructed specifically for a 21mm lug width. Many manufacturers offer aftermarket straps in this size. Always verify that the strap is labelled 21mm and do not confuse this measurement with the width of the strap body, which may vary. We recommend direct measurement of your lugs prior to purchase.

A quality leather strap, crafted by a specialised atelier, typically lasts 4-7 years of daily wear, depending on frequency of use and maintenance. Vegetable-tanned leather and shell cordovan age excellently, developing patina. Periodic maintenance—gentle cleaning and occasional conditioning—significantly extends lifespan. A technical rubber strap offers comparable durability but requires less upkeep.