Strap for Big Pilot

The lug width (or lug width) of the IWC Big Pilot IW5009-01 is 22 millimetres. This dimension is measured from the centre-to-centre distance of the holes where the spring bar or pin is inserted. This specific measurement was designed to allow the strap to sit correctly on the wrist whilst maintaining balanced visual proportions relative to the 46.2mm case diameter.

For the Big Pilot IW5009-01, straps in alligator (for traditional elegance), shell cordovan (for density and long-term patina), vegetable-tanned leather (for ethical sourcing and organic ageing) or superior quality calf (for daily practicality) are recommended. FKM rubber remains the functional choice for those who fly operationally. Selection depends on intended use: formal aesthetics require premium leather, tactical use favours robust rubber or durable leather.

Strap changing requires extraction of the spring bar or pin (depending on the 5009 construction variant). Use a spring bar removal tool (a small specialist screwdriver) to gently compress the internal springs and extract the bar from the case lug holes. Once removed, the old strap is taken off and the new one aligned. The bar is reinserted into the holes, ensuring it is fully seated on both sides. To prevent case scratching, it is advisable to protect the case with a soft cloth during the operation.

Yes, any strap with a 22-millimetre lug width is compatible with the Big Pilot IW5009-01, provided the strap height (the material thickness at the spring bar end) is consistent with the original design. Straps in alligator, shell cordovan, calf, vegetable-tanned leather and rubber are all compatible. Milano Straps offers a specialised collection of 22mm straps customisable in leather selection and deployante options in steel or titanium.

The lifespan of a leather strap for the Big Pilot depends on material quality and usage patterns. A high-quality alligator or shell cordovan strap typically lasts 5 to 8 years with daily wear, with accelerated patina development in the first year. Vegetable-tanned or calf leather, with regular maintenance (light conditioning and protection from extreme humidity), reaches 4 to 6 years. On an IWC of this calibre, strap replacement every 5–7 years is recommended maintenance. Milano Straps Italian leather straps include an 18-month warranty covering manufacturing defects.