Strap for Big Pilot Stainless Steel / Black / Las Vegas

The lug width of the Big Pilot IW5004-29 is 22mm. This refers to the internal spacing between the watch lugs where the strap attachments sit. When purchasing an aftermarket strap, ensure it is specifically sized for 22mm, as this dimension maintains the visual and functional balance on a 46.20mm case diameter.

For the Big Pilot, dark brown alligator leather with vegetable tanning is the historically authentic choice: it develops natural patina over time and creates an elegant tonal contrast with the dial. Alternatively, black rough-out calf leather preserves the military severity of the instrument, whilst shell cordovan offers robustness and evolving patina over the years. NATO fabric straps remain functional for sporting contexts.

The strap is changed by removing the lugs from the watch case. Obtain a spring bar tool (the small fork-shaped metal extractor): insert the tip beneath the lug to release the internal spring pressure, then slide the lug free from the case end link. Repeat on both sides. Take care not to scratch the case during the operation.

Yes, any strap with a lug width of 22mm is compatible. Always verify that the internal width (expressed in millimetres) matches that of the original lugs. Milan Straps 22mm straps are specifically tested for the Big Pilot and offer customisation in leather, grain and colour options.

A quality leather strap (alligator, calf, shell cordovan) lasts on average 3–5 years with daily wear, provided it receives periodic maintenance and is not exposed to extreme humidity. Vegetable-tanned leather develops authentic patina, whilst structural durability depends on grain and leather thickness. With proper care and occasional water-repellent treatments, longevity can extend to 7–8 years.