Strap for Pilot's Watch Chronograph APXGP

The lug width of the IWC Pilot IW3780-09 is exactly 21 millimetres. This measurement is determined by the distance between the two lateral pins (lugs) of the case. Measuring with a ruler between the attachments ensures you purchase a perfectly compatible strap.

The ideal strap depends on usage and desired aesthetic. Alligator leather in vegetable tanning offers elegance and develops natural patina over time; calf leather maintains softness and breathability; NATO nylon echoes the watch's aeronautical heritage. For the 43mm case, we recommend 3.5–4mm thickness and buckle in stainless steel or titanium.

Remove the old strap by gently extracting the lateral pins from the case using an appropriate tool (spring bar tool). Insert the new pins into the lugs, ensuring they sit securely in position. The operation takes minutes and is best performed by a watchmaker if you lack the correct tools.

Yes, any strap with a 21-millimetre lug width is compatible. The key is verifying the exact measurement. Bespoke straps crafted to specification for this width guarantee perfect fit, aesthetic coherence, and build quality equivalent to or superior to originals.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with regular wear, developing a desirable patina. Longevity depends on climate conditions, frequency of use and care (avoid prolonged water exposure). Artisanal vegetable-tanned straps tend to age more gracefully than industrial leathers.