Strap for BC4 Retrograde Day Stainless Steel / Black

The lug width of the Oris BC4 01 735 7617 4164-07 5 22 58FC is 22 millimetres. This measurement represents the distance between the two screw attachment points on the case where the strap is fitted. Any aftermarket strap must strictly comply with this dimension to ensure compatibility and secure wearability.

Strap selection depends on intended use. For professional aviation or formal environments, we recommend leather in alligator or vegetable-tanned calf, in cognac or black colourways. For rapid changeover and extreme environment resilience, a nylon NATO is ideal. For absolute durability at altitude and critical temperatures, FKM rubber delivers maximum reliability without compromise.

Position the watch on a level surface. Using a spring bar tool, press downward on the spring mechanism securing the lower lug, carefully lifting the pin until fully extracted. Repeat for the upper lug. Reverse the procedure with the new strap: insert the pin into the guide, ensure the spring is correctly positioned, and verify that both sides are securely locked.

Yes, the Oris BC4 01 735 7617 4164-07 5 22 58FC accepts any 22mm compatible strap. It is essential to verify that the strap features lugs of the correct width to avoid excessive play. Milano Straps provides a complete collection of artisanal straps certified for this lug width.

Leather strap durability depends on frequency of wear, moisture exposure, and tanning quality. An alligator strap with vegetable tanning, worn daily in a controlled environment, maintains structural integrity and natural patina for 3–5 years. Persistent moisture exposure reduces this window to 18–24 months. Regular maintenance—annual conditioning with natural wax and rapid drying after water exposure—significantly extends service life.