Strap for Big Crown ProPilot Worldtimer Stainless Steel / Grey

The lug width of the Oris ProPilot 01 690 7735 4063-07 5 22 05FC is 22 millimetres. This measurement represents the outer distance between the two horizontal attachment pins of the case. When verifying the compatibility of an aftermarket strap, it is essential to measure this distance with precision: a strap slightly narrower or wider compromises aesthetic alignment and may cause mechanical instability during daily wear.

The choice depends on your intended use. An alligator leather strap with vegetable tanning offers elegance and develops patina naturally over time; for humid environments, shell cordovan resists moisture better. An 18 oz NATO strap represents the purist choice for a tool watch, offering maximum security and quick-change capability. For dynamic or tropical settings, a natural rubber synthetic strap combines durability, water resistance, and ease of maintenance. A stainless steel deployante with an alcantara strap creates a sophisticated and protective solution.

The procedure is straightforward but requires attention. Using a small spring bar tool or dedicated strap removal tool, gently extract the horizontal pins from the case lugs (one at a time, starting from one corner). Slide the old strap away and keep it to the side. Insert the new strap whilst ensuring the pins remain parallel to the case attachments, then reinsert the pins with calibrated pressure until you feel the engagement click. Verify that the strap is perfectly aligned with the case edges before wearing your watch.

Yes, any strap with a 22mm lug width is mechanically compatible. However, construction quality, materials, and finish vary significantly between manufacturers. Artisanal straps crafted from premium leather (alligator, shell cordovan, vegetable-tanned calf) or selected fabrics (NATO cordura, 18 oz canvas) ensure durability, tactile comfort, and noble aging. Avoid straps with thin leather or poorly dimensioned pins: these compromise both aesthetics and mechanical security over time.

Durability depends on leather quality and usage patterns. An alligator or shell cordovan strap with vegetable tanning, subjected to moderate daily wear, lasts 3–5 years before replacement is necessary. An economy vegetable-tanned leather strap resists 1–2 years. Factors such as humidity, perspiration, sun exposure, and irregular maintenance accelerate wear. To extend lifespan, apply protective balms every 3–6 months, avoid frequent immersion unless necessary, and rotate between multiple straps to distribute mechanical stress. A NATO or rubber strap lasts significantly longer, 5–10 years or beyond, owing to the absence of biological tanning processes.