Strap for Big Crown ProPilot GMT Stainless Steel / Black

The lug width of this model is 22 millimetres. This measurement represents the space between the internal attachment points of the case where the watch strap sits. Correct measurement is critical for ensuring compatibility with quality aftermarket straps. Measure between the inner holes only, disregarding the physical protrusion of the lugs themselves.

The choice depends on intended use and aesthetic preference. For an authentic aviator aesthetic, black or deep brown alligator amplifies the technical-military character. For daily versatility, vegetable-tanned leather develops a natural patina that evolves beautifully over time. NATO straps in technical fabric ensure practicality for sports or challenging weather without compromise. Vulcanised rubber straps represent the most dynamic solution for particularly active wearers.

The process requires minimal tools: a spring bar remover or small lever-style tool suffices. Position the tool beneath the spring bar connecting the strap to the case, applying gentle pressure to release tension. The bar will retract, allowing strap removal. To install a new strap, insert the bar into the holes and compress until it clicks into place. This operation takes minutes and guarantees quick changing without damaging the case.

Any strap featuring a 22-millimetre lug width is compatible. This includes full-grain leather options—alligator, calf, cordovan—as well as fabric with leather backing (NATO, Zulu). Milano Straps provides a curated selection of handcrafted straps in this size, crafted from noble materials and finished for longevity. Compatibility is guaranteed by standardised spring bar specifications.

Longevity depends on tanning quality and usage intensity. Alligator or calf leather with excellent vegetable tanning typically lasts 4 to 7 years under regular daily wear, whilst patina continues developing positively. Technical fabric NATO straps last 5–6 years before visible wear appears. Vulcanised rubber resists moisture particularly well, ideal for humid climates. Regardless of material, proper maintenance—cleaning with a damp cloth, rapid drying—significantly extends the strap's useful life.