Bell & Ross · Instruments

Strap for BR 05 Stainless Steel / Skeleton Blue / Bracelet

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter40 mm
ReferenceBR05A-BLU-SKST/SST
FamilyInstruments
MovementBell & Ross caliber BR-CAL.322 Hours, Minutes, Seconds | Date | Skeleton
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Instruments BR05A-BLU-SKST/SST

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Instruments BR05A-BLU-SKST/SST, seen from the bench

The Bell & Ross Instruments BR05A-BLU-SKST/SST houses the BR-CAL.322 caliber with hour, minute, second and date functions. The movement features a skeletonized construction that exposes the mechanism of the caliber. The watch belongs to the Instruments collection of the French brand specialized in aviation-inspired timepieces.

Frequently asked questions

What is the lug width of the Bell & Ross Instruments BR05A-BLU-SKST/SST?

The lug width is 22mm, an intermediate dimension that requires carefully constructed straps. To verify compatibility, measure the distance between the inner shoulders of the lugs from the case base.

Which strap is best for the BR05A-BLU-SKST/SST?

It depends on intended use. Niloticus alligator amplifies the instrumental character with patina that evolves over time. Vegetable-tanned calf offers sober daily elegance. Shell cordovan is ideal as a long-term investment due to aesthetics that improve with wear. NATO maintains focus on pure functionality.

How do I change the strap on the Bell & Ross Instruments BR05A-BLU-SKST/SST?

The BR05A-BLU-SKST/SST has no integrated deployant, so the strap is fixed via standard spring bars. Gently lever the lugs with a dedicated tool (spring bar tool) to loosen and remove the old strap, then insert the new one aligning the keepers with the lugs.

Can I use an aftermarket strap compatible with this model?

Yes, <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-22mm">22mm compatible straps</a> are available ready for shipment, customizable in length, initials and stitching thread. Ensure the lug width is exactly 22mm when ordering.

How long does a leather strap last on the BR05A-BLU-SKST/SST?

Duration depends on material and use. Alligator and vegetable-tanned calf last 3-5 years of daily wear. Shell cordovan reaches peak aesthetics after 3-5 years and continues improving up to 8-10 years. Nylon NATO and FKM rubber are more durable and resist moisture and salt water.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only