Strap for Big Crown ProPilot Big Date Stainless Steel / Black / Stainless Steel

The lug width of the Oris ProPilot 01 751 7697 4164-07 8 20 19 is 20mm. This measurement corresponds to the distance between the centres of the holes on the case lugs and allows you to fit straps compatible with the same dimensional standard.

For the ProPilot, we recommend three options: (1) Shell cordovan or vegetable-tanned calf leather, for the golden patina that evolves over time; (2) Alligator, which offers formal elegance and durability; (3) NATO fabric or rubber, for saline environments and superior water resistance. Your choice depends on intended use: civil aviation, corporate environment, or outdoor adventure.

Use a spring bar tool to gently remove the metal spring bars from the case lugs. Press the tool inward on the spring bar to release it, withdraw the old strap, then insert the new one by aligning the holes with the lugs. Ensure both ends of the spring bar are firmly secured before wearing the watch.

Yes, any strap manufactured to the 20mm lug width specification is compatible with your ProPilot. Artisanal straps from milanostraps.it are crafted to precise technical specifications and guarantee perfect fit without lateral play. Always verify the lug width before purchasing.

A vegetable-tanned leather strap, worn on a pilot's watch, typically lasts 3 to 5 years with regular maintenance. Exposure to cabin humidity, high-altitude UV radiation, and thermal fluctuations accelerates ageing. Patina development is part of the aesthetic value, but periodic replacement remains advisable. NATO fabric or FKM rubber straps extend durability to 7–10 years without maintenance.