IWC
Pilot IW3878-08 (aka: IW387808)— lug 20mm

The 43mm IWC Pilot IW387808 has a lug width (lug-to-lug) of 20mm. This measurement is specific to this generation of the Pilot model and ensures balanced proportions between the case diameter and the band. To verify the width, measure the distance between the horizontal pins at the points where the strap emerges from the case.

The ideal strap depends on your style and use. To preserve the aeronautical aesthetic, we recommend dark brown alligator or vegetable-tanned calf in warm-dark tones (tobacco, burgundy). If you prefer military emphasis, a military green or navy blue NATO strap is an authentic choice. Quality 20mm straps develop natural patina that aligns with the aging process of the brushed case.

Changing the strap requires removing the spring bars that connect the strap to the case lugs. Use a dedicated tool (spring bar tool) to extract the pins, avoiding scratching the finishes. The process is reversible: the original strap remains preserved. If you are not experienced, the Casati Milano atelier offers professional strap change service with a guarantee on case preservation.

Yes, any 20mm strap is mechanically compatible with the 387808, thanks to standard spring bars. The important thing is to choose a thickness that does not create excessive play (ideal 3.5-4.5mm). Verify that the material and color align with the brushed case aesthetic: we advise against bright finishes or high-visibility colors (gold, silver, bright reds) that create visual imbalance.

A quality leather strap typically lasts an average of 2-3 years with medium wear. In the first 6 months the patina develops rapidly; then it stabilizes. Alligator remains visually stable but less responsive to aging; vegetable-tanned calf develops fine creases and progressive darkening, both desirable aesthetics. Regular maintenance (cleaning, light hydrophobic treatments) extends functional lifespan.