Strap for Big Pilot's Watch Perpetual Calendar Stainless Steel / Blue

The lug width of the IWC Big Pilot IW5036-05 is 22mm. This dimension is machined into the platinum case and requires straps with a width between 21.9 and 22.1mm to ensure perfect insertion without radial play. You can verify the measurement using a digital calliper placed in the inner groove between the case lugs.

For a platinum Big Pilot, we recommend straps in vegetable-tanned alligator (cognac brown, aged black) or shell cordovan: both materials develop a patina over time that complements the solidity of platinum. Black alligator creates visual continuity with the deep blue dial; burgundy cordovan adds gravitas. We advise against rubber and NATO straps, which would diminish the constructive authority of the watch.

Strap removal requires extracting the spring bars (strap pins) using a dedicated tool. Position the watch on a soft surface, insert the tool into the groove beneath the lug to compress the elastic pin, then remove the old strap and insert the new one. Given the platinum case and the value of this reference, we recommend entrusting the task to a professional watchmaker or the Casati Milano atelier to avoid damage.

Yes, provided the lug width is exactly 22mm. Verify the vendor's specifications: many universal straps are available in this size. Milano Straps' straps for 22mm lugs are tested for compatibility with the Big Pilot and customisable in leather, colour, stitch thread and initials. The Casati Milano atelier offers bespoke straps with personalised consultation.

A premium leather strap (alligator, shell cordovan) lasts 3-5 years with daily wear, accounting for lug wear from strap changes and natural leather elasticity degradation. Vegetable tanning ages better than chrome tanning, developing patina rather than deterioration. The Casati Milano atelier guarantees 18 months and recommends preventive strap replacement every 4-5 years to preserve the integrity of the platinum case.