Strap for Big Crown ProPilot Big Date Stainless Steel / Grey

The lug width of the ProPilot Ref. 01 751 7697 4063-07 5 20 19FC is 20 millimetres. This measurement represents the distance between the two internal lugs of the case that accommodate the strap. Always verify this dimension before ordering an aftermarket strap to ensure complete compatibility.

The choice depends on intended usage and aesthetic preference. An alligator leather with vegetable tanning offers formal elegance; a NATO nylon strap guarantees aviation authenticity and quick-change practicality; a structured calf provides seasonal versatility; an FKM rubber strap is ideal for aquatic or high-humidity environments. The brushed stainless steel case pairs naturally with all these materials.

Strap replacement is accomplished by removing the spring bars that connect the lugs to the case. Use a strap removal tool to gently press the spring bars, releasing the mounted strap. Insert the new strap, aligning it with the lugs and allowing the spring bars to snap into position. For models with deployante clasps, verify that the closing mechanism is intact after installation.

All artisanal and industrial straps with a standard 20-millimetre lug width are compatible. We recommend always verifying the manufacturer's specification, but straps in alligator, calf, rubber and NATO from specialised brands such as Milano Straps guarantee construction quality and precise tolerances for this model.

A vegetable-tanned leather strap, worn daily, has an average lifespan of 3 to 5 years before replacement becomes necessary. This period varies depending on relative humidity, frequency of sun exposure and maintenance. The leather naturally absorbs moisture and develops a patina, an aesthetic indicator of ageing. FKM rubber straps have a longer lifespan in hostile environments, up to 7 to 10 years with proper maintenance.