Strap for BC3 Advanced Day Date DLC / Black / Fabric

The BC3 features a 22-millimetre lug width, an intermediate specification that distinguishes it from standard sports chronographs. This dimension requires bespoke straps and ensures balanced proportions between the 42mm case and the wrist.

American alligator leather in black or dark brown is the classic aviator choice. For a contemporary aesthetic, vegetable-tanned Italian calf offers a patina that ages naturally over time. A thick cotton NATO strap recovers the military heritage of the chronograph.

The BC3 uses screw bars on the case (protruding externally). Position the watch on a soft pad, locate the strap screw bar with a specialist tool (spring bar tool or small slot screwdriver), rotate anticlockwise until the bar loosens. Extract the old strap, insert the new one by aligning the bar, tighten manually with controlled firmness.

Yes, provided the lug width is 22mm and the strap's constructive profile (lug hole depth and geometry) respects the Oris case interface. Certified artisanal straps, such as those offered by Casati Milano, guarantee compatibility and durability.

A quality artisanal alligator or vegetable-tanned leather strap resists 3–5 years of daily wear, provided minimal maintenance (soft cloth cleaning, rapid drying after moisture exposure). Vegetable tanning benefits from natural patina, extending aesthetic appeal beyond functional lifespan.