Strap for Big Pilot Le Petit Prince

The lug width of the IWC Big Pilot IW5009-16 is 22mm. This dimension is specific to the model and is essential for ensuring compatibility with aftermarket straps. Lug width is measured between the primary spring bar holes inside the lugs; any strap must meet this tolerance to the millimetre.

A vegetable-tanned leather strap is recommended for the Big Pilot, maintaining coherence with the model's avionic heritage. A dark brown calf leather with a stainless steel deployante, or black leather with a steel buckle, will enhance the military aesthetic. Alternatively, a natural vulcanised rubber strap is ideal for sporty use and resists moisture and low temperatures.

The strap is changed by extracting the spring bars from the lugs using a dedicated tool (spring bar tool). Press the bar on one side to disengage it, then pull the strap outwards. Proceed carefully to avoid scratching the case. Align the new bars with the slots, insert the strap on the right side, then push the left bar until it clicks into place. Verify security by moving the strap gently.

Yes, any strap with a 22mm lug width is compatible with the Big Pilot IW5009-16. Milano Straps offers a collection of 22mm straps designed and tested for this model, available in leather, rubber and fabric, customisable in size, initials and thread colour.

A quality leather strap with vegetable tanning, such as those offered by Milano Straps, has an average lifespan of 4–6 years with daily use. Longevity depends on factors such as perspiration, sun exposure, maintenance and rotation with other straps. A well-aged leather develops patina and becomes more durable over time. The standard 18-month warranty covers manufacturing defects.