IWC
Big Pilot IW5020-05 (aka: IW502005)— lug 22mm

The lug width of the Big Pilot IW5020-05 is 22 millimeters. This measurement is specific to this model and should not be confused with other common sizes such as 20mm or 24mm. To verify the lug width, position the watch with the caseback facing upward and measure the internal space between the two lugs, excluding the outer metal edges. All 22mm straps from the Milano Straps catalog are immediately compatible.

For the Big Pilot IW5020-05, cognac alligator remains the classic choice: the regular grain and warm tone create perfect aesthetic dialogue with the black dial and titanium case. Satin black alligator represents the purist alternative. If you prefer practicality, fine-weave NATO fabric or dark grey rubber with fine texture guarantee durability without maintenance. The Casati Milano atelier allows you to choose the leather during a personalized consultation.

Changing the strap requires a specific tool: spring bar removal tools. Position yourself in a well-lit environment, insert the tip of the tool into the small hole under the lug, gently lifting the spring bar until the metal lug is freed. Repeat on the other side. Remove the old lug and insert the new one, ensuring the spring bar clicks firmly into the housings. If you are not confident, the change can be entrusted to a watchmaker: the procedure takes only a few minutes but slight incorrect pressure could scratch the case.

Absolutely yes. The 22mm lug width is a standard size in the luxury watch market; therefore any strap produced for this measurement is compatible. Milano Straps straps, handcrafted in Italy with quality leathers and artisanal workmanship, represent an upgrade over the original IWC strap, especially in color customization and comfort. The Casati Milano atelier also offers straps made completely to measure.

The lifespan of a leather strap varies based on frequency of use and environment. Alligator, with its denser fibrous structure, typically lasts 2-3 years with daily use; calf leather, being softer, requires replacement every 18-24 months. Proper maintenance (avoid excessive moisture, do not expose to prolonged direct sunlight) extends the life by up to 40%. The Casati Milano atelier provides straps with an 18-month warranty and recommends biannual maintenance to preserve the patina.