Bell & Ross · BR-03

Strap for BR 03-94 RS17

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter42 mm
ReferenceBR0394-RS17
FamilyBR-03
MovementBell & Ross caliber BR-CAL.301 Hours, Minutes, Small Seconds | Date | Chronograph
CaseCarbon | Ceramic, Aluminium

Spring bar

Swiss Standard universal spring bars

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

Straps for the BR-03 BR0394-RS17

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The BR-03 BR0394-RS17, seen from the bench

The Bell & Ross BR-03 BR0394-RS17 is a radical instrument watch featuring a square case with rounded corners crafted from composite carbon and ceramic on aluminum. It houses the BR-CAL.301 automatic movement with hours, minutes, small seconds, date, and chronograph functions. The 42mm case diameter accommodates the unidirectional rotating bezel and structured dial, while the 20mm lug width reflects the compact proportions of the square case design and ensures precise strap fit without lateral play or constriction.

Frequently asked questions

What is the lug width of the Bell & Ross BR-03 BR0394-RS17?

The Bell & Ross BR-03 BR0394-RS17 features a lug width of 20 millimetres. This dimension reflects the proportions of the square case and is essential for selecting a strap with precise millimetric tolerance. 20mm straps represent a specific market category, less common than 22mm or 24mm sizes, requiring selection from specialised suppliers.

What strap is recommended for the Bell & Ross BR-03 BR0394-RS17?

For the BR0394-RS17, straps in alligator, vegetable-tanned calf leather, or tactical-grade nylon NATO are recommended. Alligator offers luxury and natural ageing patina, while vegetable-tanned calf delivers essential elegance. NATO ensures robustness and ease of replacement for extreme sports contexts. The choice depends on intended use and dress code context.

How do you change the strap on the Bell & Ross BR-03 BR0394-RS17?

Strap replacement requires a dedicated tool (spring bar removal tools) or specialist atelier service. The BR0394-RS17 lugs house a pass-through pin that must be extracted with precision to avoid damage to the carbon and ceramic case. It is advisable to entrust the operation to an expert to prevent scratches. Milano Straps and Casati Milano atelier offer installation service.

Is an aftermarket strap compatible with the Bell & Ross BR-03 BR0394-RS17?

Yes, any aftermarket strap with a 20mm lug width is compatible with the BR0394-RS17, provided dimensions are precise. It is essential to verify that the strap is designated for 20mm width and that length suits the case lugs. Milano Straps offers a complete range of aftermarket straps for this size, customisable in leather, colour and stitching thread.

How long does a leather strap last on the Bell & Ross BR-03 BR0394-RS17?

Leather strap durability depends on craftsmanship quality, material and usage. A high-quality alligator or shell cordovan strap resists 5–8 years with daily wear, developing noble patina. Vegetable-tanned calf lasts 3–5 years maintaining good aesthetic condition. Casati Milano atelier offers 18-month warranty on bespoke straps and allows scheduled updates via WhatsApp.

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.

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