Strap for Oris Flight Timer 01 635 7568 4061

The Oris Flight Timer 01 635 7568 4061 features a lug width of 21mm. This measurement is taken by placing a digital calliper between the two metal lugs protruding from the case shoulders. The internal distance between these attachment points is precisely 21mm, ensuring compatibility with all straps designed for this width specification.

For the Flight Timer, we recommend a vegetable-tanned leather strap in dark brown or black to emphasise its vintage aviator character, or a textured alligator strap for more formal occasions. If you prefer versatility, a heavyweight canvas NATO in brown allows quick changes. FKM rubber is ideal if your watch accompanies aquatic activities or humid environments, without compromising the tool-watch aesthetic.

To change the strap, gently remove the existing strap by disengaging the lugs from the metal pins protruding from the case shoulders. Use a spring bar tool to compress the internal spring and slide the pin out smoothly. Align the new 21mm strap holes with the protruding pins, then press until you hear a click confirming secure attachment. The procedure takes minutes and requires no specialised skills.

Yes, all quality artisanal straps designed for 21mm lug width are fully compatible with the Flight Timer. Premium leather, alligator and NATO straps in 21mm fit perfectly onto the case's metal pins without play or forcing. Always verify the lug width is exactly 21mm before purchase to ensure proper fitment.

A vegetable-tanned leather strap typically lasts 3–5 years of daily wear, depending on sun exposure, perspiration and humidity levels. Vegetable-tanned leather develops natural patina and softens over time. An alligator strap, if properly maintained, lasts 5–7 years. Longevity increases when you rotate straps regularly, allowing the leather to breathe and maintain structural elasticity.