Technical Archive

Bell & Ross
Instruments BR05A-BLU-ST/SRB

Bell & Ross Instruments BR05A-BLU-ST/SRB: strap made to measure on the watch at the Casati Milano atelier, by appointment.

BR 05 Stainless Steel / Blue / Rubber

Technical Specifications

Bell & Ross BR05A-BLU-ST/SRB
Reference

BR05A-BLU-ST/SRB

Movement

Bell & Ross caliber BR-CAL.321 Hours, Minutes, Seconds | Date

The Heritage

The BR05A-BLU-ST/SRB from the Instruments collection features the BR-CAL.321 caliber with hour, minute, second and date indication. The movement guarantees the essential functions in a format suitable for daily use. The reference presents a standard technical configuration for the Bell & Ross range.
Made to Measure

The strap for this watch is made to measure

On the Bell & Ross Instruments the bracelet is drawn as part of the case: no catalogue strap will fit. In the atelier we take the measurements on the watch itself and build the strap on the piece — that is the work of Casati Milano.

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FAQ

Can a standard strap be fitted to the Bell & Ross Instruments BR05A-BLU-ST/SRB?

No, the lug attachment of the BR05A-BLU-ST/SRB is not an industry standard: it is a proprietary geometry integrated into the case. A strap cannot be mounted using conventional straight bars. However, <a href="/pages/casati-booking">Casati Milano</a> can create a made-to-measure strap, constructed and measured directly on the watch with bars fabricated specifically for that case.

How does the made-to-measure strap process work for this model?

The artisan at <a href="/pages/casati-booking">Casati Milano</a> takes a precise measurement of the usable width and curve of the lugs directly on the watch. Subsequently, the strap is constructed by stitching the leather edges onto bars fabricated for that specific case, ensuring perfect fit and zero structural play.

What type of leather suits the Bell & Ross Instruments BR05A-BLU-ST/SRB?

The squared and technical character of the BR05A accommodates leathers with natural texture and deep grain, such as vintage-style vegetable-tanned leather. Alligator, crocodile, English calf or shell cordovan also work well, especially with an autumnal patina that dialogues with the watch's deep blue dial.

How long does an artisan-crafted strap last?

A strap created using artisanal sartorial technique, utilising quality leather and hand-sewn stitching, will last many years with ordinary maintenance. Longevity depends on use, care and leather choice: vegetable-tanned leather develops patina over time and improves aesthetically.

Is the BR-CAL.321 movement the same as in other Bell & Ross models?

The BR-CAL.321 calibre is specific to the Instruments line and was developed to guarantee robustness and readability according to Bell & Ross standards. The automatic movement displays hours, minutes, seconds and date with aeronautical reliability, and is one of the reasons the BR05A-BLU-ST/SRB represents a coherent evolution of the brand's philosophy.