Strap for Oris BC4 01 653 7631 4684

The Oris BC4 01 653 7631 4684 features a lug width of 22 millimetres. This means the distance between the lugs of the case (where the strap attaches) is precisely 22mm. Always measure your watch's lug width with a digital calliper before purchasing an aftermarket strap to guarantee perfect compatibility. Milano Straps provides a comprehensive collection of 22mm straps in leather, NATO, and rubber.

There is no universally 'best' strap—it depends on your intended use. For civil aviation and regular flight missions, vulcanised rubber with fine grain offers tactical grip and maximum water resistance. For terrestrial exploration, vegetable-tanned leather in cognac or brown develops characteristic patina over time. For daily versatility, a NATO textile strap in slate grey or military green maintains tool watch aesthetics without compromise. Black alligator leather is the sophisticated choice for those desiring permanent colour stability.

To change your strap, position the watch on a soft cloth to protect the case. Locate the two spring bars that connect the strap to the lugs. Using a spring bar removal tool (fork-shaped instrument), insert the flat end beneath the bar from the inside and apply gentle outward pressure until the bar retracts. Remove the old strap and repeat on the opposite side. Insert your new 22mm strap by guiding the bars into the case lugs, pressing until they click into place. If you lack the tools, Casati Milano offers professional strap-changing service at the bespoke atelier by appointment.

Yes, provided the strap is certified 22mm. Compatibility depends on two factors: lug width (which must be exactly 22mm) and strap thickness at the base (which should not exceed 5–6mm to avoid friction with the case). Milano Straps sells exclusively tested and compatible straps for the BC4. If purchasing elsewhere, always verify technical specifications and user reviews from owners of the same model.

Durability depends on usage intensity and leather quality. A high-quality vegetable-tanned leather strap lasts approximately 3–5 years with daily wear, longer if used occasionally. The leather develops natural patina and fine surface creases that enhance its character. Alligator leather is more durable and can last 7–10 years. Vulcanised rubber is the longest-lasting option (10+ years) but deteriorates if exposed to prolonged direct sunlight. Milano Straps crafts straps with premium materials that guarantee maximum longevity.