Strap for BR 01 Instrument de Marine

The BR01-CM-203 features a 24mm lug width, measured centre-to-centre between the two spring bar holes. This substantial dimension is proportionate to the 46mm case and necessitates robust, well-constructed straps to achieve visual balance on the wrist.

The optimal choice depends on intended use and aesthetic preference. For military coherence and functionality, a grey or black NATO; for formal elegance, a black or brown alligator; for chromatic dialogue with bronze accents, a burgundy shell cordovan or vegetable-tanned calf. Selection must account for the visual tension between strap and case.

BR-01 straps are replaced by unscrewing the lateral spring bar pins connecting the strap to the case. A spring bar tool is required, and care must be taken to avoid scratching the titanium. The 24mm lug width demands straps specifically sized for this measurement.

Yes, provided the strap is specifically engineered for a 24mm lug width. Quality aftermarket straps enable personalised aesthetic expression while maintaining complete mechanical compatibility. Always verify the exact measurement before ordering.

A leather strap of high quality—alligator, shell cordovan, or vegetable-tanned calf—maintains structural functionality for 3–5 years of daily wear, developing natural patina over time. Longevity depends on ambient humidity, sun exposure, and maintenance frequency. The Casati Milano atelier guarantees 18 months against normal wear, with reconditioning available upon request.