Strap for Big Pilot Rose Gold / Silver / Andrea Concato

The lug width of the IWC Big Pilot IW5004-17 is 22mm. This measurement represents the distance between the lugs on the case and determines strap compatibility. Precise measurement is essential: even half a millimetre of error can result in looseness or poor fit during daily wear.

For the Big Pilot in rose gold, we recommend alligator with fine grain (havana or chocolate brown) for maximum refinement, or shell cordovan for those who prefer a dynamic patina over time. Vegetable-tanned calf leather offers a robust alternative that develops character with ageing. For tactical use, black canvas NATO strap maintains the authentic avionic design spirit.

Strap change is performed with a spring bar removal tool. Locate the pins on the sides of the case (the spring bars): gently pressing the tool retracts the pin on one side, allowing you to remove the old strap. Repeat on the other side. Installing the new strap requires threading both pins into their respective lugs and verifying that the strap sits symmetrically against the case. If uncertain, Casati Milano offers in-atelier change service.

Absolutely. The IWC Big Pilot 5004-17 is compatible with any quality 22mm lug width strap, whether in leather (alligator, shell cordovan, calf) or canvas NATO or rubber. Milano Straps offers artisanal straps specifically constructed for this measurement, with finishes and thicknesses optimised for case proportion.

Durability depends on material, use and care. A quality alligator strap can last 5–8 years of regular use before requiring restoration. Shell cordovan, being denser, can withstand 7–10 years. Vegetable-tanned calf, being more porous, requires greater maintenance (avoid frequent water exposure) and typically lasts 4–6 years. Artisanal straps from Casati Milano include 18-month warranty and can be restored afterwards.