Strap for BC3 Advanced Day Date Stainless Steel / Silver / Bracelet

The lug width of the Oris BC3 is 22 millimetres. This specific measurement was chosen by Oris to maintain harmonious proportions on the 42-millimetre case, ensuring a stable foundation and correct weight distribution. To verify the measurement, measure the distance between the centre of the upper lug hole and the centre of the lower lug hole on the case.

Your choice depends on intended use: for aviation authenticity, a military-grade NATO strap in heavy nylon echoes the BC3's historical DNA; for elegant daily wear, vegetable-tanned calf leather in brown or black tones offers comfort and understated sophistication; for aquatic or dusty environments, rubber ensures freedom from rot; for formal occasions, shell cordovan develops natural patina over time.

The Oris BC3 uses a standard 22-millimetre spring bar system. Insert a flat tool (typically supplied with the new strap) into the thin slots on either side of the lug, apply gentle pressure to depress the spring, then slide the old strap away. Align the new strap's hole with the spring end and press until you hear a click. Avoid forcing, as this may damage delicate components.

Any strap certified with a 22-millimetre lug width is compatible. On milanostraps.it you will find a dedicated collection of 22mm straps: artisanal leather, elastic NATO, structured rubber, shell cordovan—all engineered to fit the BC3's lugs perfectly without compromise to fit or aesthetics. Always verify that the retailer specifies '22mm lug width' in the technical sheet.

A high-quality artisanal leather strap, subject to periodic maintenance (gentle cleaning, conditioning with appropriate products), will last 4–7 years of daily wear before requiring replacement due to age wear. Longevity depends on frequency of use, ambient humidity and leather type: shell cordovan tends to last longer owing to its natural fibre density, whilst vegetable-tanned calf ages more rapidly but develops a fascinating patina. Synthetic rubber or NATO straps last indefinitely without biological degradation.