Strap for Big Pilot Perpetual Calendar Stainless Steel / Black / Bucherer

The IWC Big Pilot IW5026-07 features a lug width of 22mm. This dimension is proportioned to the 46.20mm case diameter and was designed to accommodate robust straps, consistent with the watch's aviator heritage. When purchasing an aftermarket strap, ensure the width is precisely 22mm to guarantee perfect fit to the case lugs.

For the Big Pilot, we recommend three material categories: (1) Alligator or crocodile in vegetable tanning, which imparts elegance without compromising the aviatic DNA; (2) Thick calf leather (minimum 1.4mm), preferably with grain finishing to evoke robustness; (3) Rubber or NATO fabric, selected when you wish to emphasise the sports character of the watch. Avoid delicate leathers and thin straps—this timepiece demands materials that visually support its presence.

Strap replacement is accomplished via the spring bars that connect the strap to the case lugs. Use a professional tool or contact a specialised workshop: the bars require calibrated pressure to extract without risk of damage. Atelier Casati Milano offers installation service for straps purchased or personalised, ensuring precision and quality control.

Absolutely. Any strap with a 22mm lug width is compatible. Online you will find extensive choice of 22mm straps customisable in leather, colour, thickness and stitching thread. The use of aftermarket straps does not prejudice the IWC warranty and allows you to tailor the watch according to your personal style.

A high-quality leather strap, with vegetable tanning and adequate thickness (1.4–1.6mm), typically lasts 2–4 years in daily wear. On a timepiece of this magnitude, stress is significant due to the case weight (46.20mm stainless steel). Factors such as climate, body perspiration and frequency of use affect longevity. Atelier Casati Milano guarantees 18 months on bespoke straps and offers regeneration and replacement services over time.