Strap for Pilot's Watch Chronograph Stainless Steel / Green

The lug width of the IWC Pilot IW3780-05 is 21 millimetres. This measurement determines compatibility with specific straps and ensures correct visual proportions on the 43-millimetre case. To verify the measurement accurately, use a digital calliper measuring the distance between the two lugs.

For the IW3780-05, we recommend straps in alligator or shell cordovan with vegetable tanning, which resonate with the watch's avionic heritage. Dark brown alligator creates understated elegance, whilst cordovan develops a patina that evolves over time. For more dynamic use, an FKM rubber or NATO fabric strap offers practicality without aesthetic compromise.

To change the strap, first remove the watch from your wrist. Use a spring bar tool, inserting the thin blade into the gap between the case and lug. Press gently downward to compress the internal spring, sliding the lug outward. Repeat for the other side, then install the new strap by reversing the procedure.

Yes, any strap with a 21-millimetre lug width is compatible with the IW3780-05. On milanostraps.it you will find a complete collection of artisanal straps in this size, customisable in length, leather type and stitching thread. The Casati Milano atelier also offers bespoke strap creation services with personalised consultation.

A natural vegetable-tanned leather strap, when used correctly, has an average lifespan of 3-5 years of moderate daily wear. Longevity depends on exposure to moisture, perspiration and mechanical stress. Premium leathers such as shell cordovan tend to last longer and develop character as they age. Casati Milano straps carry an 18-month guarantee against manufacturing defects.