Strap for BR 123 Original Carbon

The lug width is precisely 20mm. This dimension is determined by the integrated case lugs. To verify, measure the internal distance between the two attachment points with a digital calliper—it must be exactly 20mm. Do not attempt to fit straps sized 18mm or 22mm, as they will not align correctly with the case attachments.

The optimal choice depends on intended use. For classical elegance, dark brown alligator or black shell cordovan emphasise the minimalist character of the case. For daily functionality, vegetable-tanned calf in cognac or brown tones offers durability and natural patination over time. For sportive applications or humid environments, ballistic NATO textile or FKM rubber provide practicality whilst maintaining aesthetic rigour.

The strap is secured via standard case attachments. Use a spring bar tool to compress the spring bar laterally, releasing the old strap. Align the new strap's holes with the lugs, reinsert the spring bar, and verify it is securely fastened. If inexperienced, entrust the operation to a professional to avoid case damage.

Absolutely. Any high-quality 20mm strap with standard spring bars is compatible. Artisanal straps from milanostraps.it are specifically engineered for this lug width and maintain the proportional harmony of the BRV123-BL-CA/SRB without aesthetic compromise. They are fully customisable in dimensions, initials, and stitching thread colour.

Longevity depends on material and usage intensity. Alligator and shell cordovan retain structural integrity for 4–6 years in daily wear, developing natural patina. Vegetable-tanned calf lasts 3–5 years whilst evolving aesthetically. FKM rubber has comparable lifespan with minimal visual variation. The 18-month warranty on Casati Milano straps covers manufacturing defects; natural wear is integral to leather character.