Strap for Big Pilot's Watch Perpetual Calendar Tourbillon Le Petit Prince

The lug width of the IWC Big Pilot IW5049-01 is 22 millimetres. This dimension is specific to this Big Pilot family and is critical for visual integration with the case. Measurement is taken between the inner lugs without applying pressure, and a 22mm strap must fit into the lugs with millimetre precision.

Alligator represents the classical compromise: uniform grain, regular texture, natural patina development. Full-grain vegetable-tanned calf leather offers greater density and evolving colours over time. Shell cordovan remains exceptional for longevity and intrinsic lustre. For aviation environments, FKM rubber or dense woven nylon respect the aeronautical vocabulary whilst absorbing humidity and thermal stress.

The Big Pilot uses standard spring bar attachments. Using a dedicated spring bar tool, apply pressure to one side of the pin to release one end of the strap, then repeat on the opposite side. Next, extract the old strap and insert the new one, aligning the holes with the lugs. Case disassembly is unnecessary; the operation takes approximately 3-5 minutes.

Yes, provided the lug width is exactly 22mm and the strap is designed for large cases (46+mm). Milano Straps certified-compatible straps are available in leather, alligator, cordovan and rubber. Shipping is prompt and personalisation with initials and stitching thread colour is available.

A quality leather strap (alligator, full-grain vegetable-tanned calf) lasts 3-7 years in daily wear, depending on humidity exposure, perspiration, UV rays and cleaning frequency. Vegetable-tanned leather ages gracefully, developing patina and richer colouration. Shell cordovan, due to superior density, reaches 10+ years with proper maintenance. Casati Milano provides an 18-month warranty on all bespoke leather straps.