Strap for Big Pilot Le Petit Prince / Red Gold

The IW5009-09 features a lug width of 22 millimetres. This dimension was engineered by IWC to maintain optimal proportions with the 46mm case diameter and ensure ergonomic fit on medium to large wrists. The lug width is measured as the internal distance between the two lateral lugs that secure the strap.

There is no single "best" strap, but rather choices that align with the watch's aviator heritage. For authentic aeronautical character, a black vegetable-tanned leather ages beautifully and honours its military history. To accentuate the rose gold's nobility, a naturally grained alligator strap offers tactile and visual contrast. A shell cordovan in brown develops a refined patina over time. Your choice depends on intended use and personal aesthetic preference.

To change the strap, follow these steps: 1) Place the watch on a stable, flat surface; 2) Using a spring bar tool, gently press the lower spring bar pin to release one end; 3) Remove the old strap; 4) Align the new strap pins with the lug holes and press until you hear the spring mechanism click into place. This is straightforward but requires care to avoid scratching the case.

Absolutely. Any artisanal-quality strap featuring a 22mm lug width is fully compatible. Aftermarket straps offer the opportunity to personalise your watch according to your taste and use case. Milano Straps supplies 22mm straps in alligator, shell cordovan, calf leather, vegetable-tanned leather, and rubber options with deployant clasps.

A high-quality, artisan-made leather strap—whether vegetable-tanned or shell cordovan—typically lasts 3 to 5 years of daily wear, provided proper care: avoid prolonged water exposure, protect from direct sunlight over extended periods, and apply natural oils occasionally to maintain elasticity. The patina that develops is integral to the beauty of natural leather. Milano Straps warrants its straps for 18 months and offers regeneration and spring bar replacement services at the Casati Milano atelier.