Strap for Big Pilot's Watch Perpetual Calendar Tourbillon Le Petit Prince

The lug width of the IWC Big Pilot IW504803 is 22mm. This measurement represents the distance between the two lugs (curved extensions) at the end of the case where the strap connects via spring bars. To ensure compatibility, verify that any aftermarket strap has an exactly 22mm lug width.

For the Big Pilot IW504803, we recommend premium leather straps: alligator with natural patina development, vegetable-tanned Italian calf for chromatic harmony with the red gold case, or shell cordovan for extreme durability. Alternatively, FKM rubber on a deployant clasp maintains versatility without compromising the aesthetic presence of the red gold case.

Changing the strap on the IW504803 requires extracting the spring bars from the lug ends. Obtain a proper spring bar removal tool, position the fulcrum in the central hole of the spring bar, apply gentle pressure until it releases, then carefully withdraw the bar. Align the new strap's holes with the spring bars and re-secure them. If unfamiliar with this procedure, consult a certified watchmaker.

Yes, any strap with 22mm lugs is compatible with the IW504803. Milano Straps offers handcrafted leather straps in vegetable-tanned and composite materials, customisable in size, colour, initials, and stitching thread. The Casati Milano atelier also creates bespoke straps with an 18-month warranty.

Durability depends on material and usage patterns. Vegetable-tanned Italian calf typically lasts 3–5 years under normal conditions; shell cordovan exceeds 7–10 years due to superior molecular density. Alligator offers 4–6 years of reliable service. Periodic maintenance (gentle cleaning, occasional conditioning) significantly extends strap lifespan. In humid environments or with frequent water contact, any leather strap degrades faster; in such cases, opt for FKM rubber instead.