Strap for Oris BC3 01 635 7534 4164

The lug width (ansa measurement) of the BC3 is precisely 20mm. This dimension is standard for the model and is essential when selecting an aftermarket strap. To verify it accurately, use a digital calliper positioned between the inner shoulders of the two lugs on the case.

The BC3 accommodates multiple strap types effectively. A NATO strap in grey or military-green nylon emphasises its tool watch heritage and offers convenient quick-change functionality. For leather enthusiasts, a calf strap in dark brown develops natural patina over time, whilst alligator delivers measured elegance without compromising its aviator practicality.

The procedure requires a spring bar removal tool. Position the forked end of the tool under the spring bar pin on the upper lug, press downward to compress the mechanism whilst simultaneously pulling the old strap outward. Repeat on the lower pin. Installation of the new strap follows the reverse process: thread the pins through the lugs and ensure they click securely into position.

Yes. Any strap with a 20mm lug width is compatible with the BC3. Milano Straps offers an extensive selection of leather straps (calf, alligatore, vegetable-tanned shell cordovan), NATO nylon, and technical rubber options. All are available in various colourways and are ready to ship.

Longevity depends on usage intensity and construction quality. A high-grade calf strap, worn daily under normal conditions, typically lasts 3-5 years before showing deep fibre wear. Premium alligatore exceeds 5 years. Humidity exposure, UV radiation and tanning method (vegetable versus synthetic) all influence durability. Regular maintenance—gentle cleaning and conditioning—significantly extends strap lifespan.