Strap for Oris BC3 01 735 7641 4794

The lug width of the Oris BC3 01 735 7641 4794 is 22mm. This measurement refers to the distance between the lugs of the case, where the strap attachments sit. To verify correctly, use a digital calliper and measure from internal bar to internal bar. A 22mm lug width is proportionate to a 42mm case and permits a wide selection of compatible artisanal straps.

The ideal strap depends on usage context. For professional or sporting wear, we recommend vegetable-tanned leather (dark brown calf) paired with a stainless steel deployante, which develops a beautiful patina over time and complements the tool character of the watch. A NATO in military green is the purist's choice, maintaining fidelity to the aeronautical heritage. For intensive use or humid environments, rubber is the most practical solution. All these materials are available in 22mm artisanal versions on Milano Straps.

The procedure is straightforward. Position the watch on a soft surface with the caseback facing you. Locate the two lugs on the case. For each side, you must remove the bar passing through the lug: use a springbar tool to compress the internal spring slightly, then extract. Once both bars are removed, the old strap separates from the case. Insert the new bars into the new strap and fix them to the lugs, ensuring the springs click correctly. Verify that the strap aligns properly with the case.

Absolutely. Any strap with a 22mm lug width is compatible with the BC3. An artisanal leather, NATO, or rubber strap from a specialist manufacturer like Milano Straps often offers construction quality superior to OEM straps, with more refined finishing and selected materials. Compatibility is guaranteed by standardised lug width: 22mm remains 22mm, regardless of manufacturer. The only verification necessary is confirming that the strap thickness at the attachment does not exceed the available space in the lug.

Durability depends on intensity of use and tanning type. A vegetable-tanned calf strap used daily maintains structural integrity for 3–5 years. The leather develops a visible patina and chromatic depth over time. Factors affecting durability: frequency of use, sun exposure (which dries the leather), ambient humidity, and perspiration. Maintenance is minimal: every six months, apply a neutral conditioner to maintain elasticity. A NATO or rubber strap lasts longer (5–10 years) as they resist moisture better. When your strap reaches the end of its life cycle, Milano Straps offers rapid replacement with a new personalised 22mm strap.