Strap for Big Crown ProPilot GMT Stainless Steel / Grey

The lug width is 22 millimetres. This measurement is the standard for sport watches in this category and ensures proper seating of the 45mm case without lateral play. To verify aftermarket strap compatibility, measure the internal distance between the two attachment pins on the case lugs.

We recommend vegetable-tanned leather straps (burnt earth brown, dark chestnut) for daily wear, alligator for formal occasions, and military-style NATO fabrics for recreational use. FKM rubber is ideal for highly humid environments or water-intensive activities. The choice depends on intended use and your commitment to material maintenance.

Use a dedicated spring bar removal tool or consult a professional watchmaker. Position the watch with lugs vertical, compress the spring bar pin inward with the tool, remove it completely, and install the new strap's pin. The procedure requires precision: an accidental strike can damage the case lug.

All straps with 22mm lug width are compatible. Milano Straps offers a dedicated collection of Italian leather, shell cordovan, rubber, and NATO straps, all ready to ship and available in multiple colours. Always ensure the strap features open lugs to accommodate pin insertion.

With regular daily wear and proper maintenance, a vegetable-tanned leather strap typically lasts 2–4 years. Lifespan depends on usage frequency, exposure to water and humidity, and care treatments (protective balms). Vegetable tanning develops natural patina over time, enhancing aesthetic character. Rubber straps have similar lifecycle duration but degrade through UV exposure rather than hydration loss.

Yes, this is common practice with sport instruments like the ProPilot. The standardised 22mm lug width enables rapid rotations. Summer demands breathable materials (NATO, rubber); winter favours thicker leather or alligator. This modularity amplifies the versatility potential of the instrument.