Strap for Oris BC3 01 735 7641 4361

The BC3 features a 22mm lug width. This is measured using a digital caliper by determining the distance between the two slots on the straight and curved lugs. This dimension accommodates robust rubber straps, NATO textile bands, and structured leather without altering the watch's visual proportions.

We recommend three options: alligator or vegetable-tanned leather in dark shades to emphasise functional severity; NATO textile in olive green or graphite grey to restore instrumental authenticity; FKM rubber for high-use environments or humid conditions. Your choice should balance haptic luxury against operational versatility.

Use a spring bar removal tool. Insert the flat blade beneath the lug pin, apply even pressure to compress the internal spring, and extract the bar completely. Remove the old strap, insert the bar into the new strap, and secure it to the lugs with gentle pressure until you hear a click.

Yes, provided the strap is certified for 22mm lug width. Manufacturing tolerance is ±0.5mm. Verify that the passants accommodate the case lugs comfortably without forcing. Our 22mm straps are tested for compatibility with the BC3 and equivalent Oris models.

A quality leather strap—alligatore, calf, or shell cordovan—typically lasts 3–5 years with daily wear and regular maintenance. Factors influencing durability include UV exposure, humidity, frequency of wear, and perspiration levels. Vegetable-tanned leather ages more nobly than chrome-tanned, developing subtle patina. Clean quarterly with a damp cloth and lubricate the pin with silicone oil annually.