Bell & Ross · BR-03

Strap for BR 03 92 Type Aviation Carbon

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
ReferenceBR0392-AVIA-CA
FamilyBR-03
MovementETA caliber 988.333 Additional 12 hours Hand (adjustable), Additional 24 hours Hand (adjustable), hours, minutes, seconds | date, day, perpetual calendar | Chronograph, countdown | alarm | power reserve indicator
Year2009
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 BR-03 BR0392-AVIA-CA

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The BR-03 BR0392-AVIA-CA, seen from the bench

The Bell & Ross BR-03 92 Type Aviation Carbon features a square stainless steel case with 42 mm diameter and ETA caliber 988.333 movement. The watch includes a chronograph with countdown function, perpetual calendar, power reserve indicator, and adjustable 12/24-hour hand. Water resistance reaches 100 metres. The 20 mm lug width is the standard for this BR-03 model and ensures compatibility with aftermarket straps. The design combines pilot instrument functionality with aesthetic precision, maintaining the original aviation cockpit heritage.

Frequently asked questions

What is the lug width of the Bell & Ross BR-03 BR0392-AVIA-CA?

The lug width (strap width) of the Bell & Ross BR-03 BR0392-AVIA-CA is 20 millimetres, measured between the two attachment points on the case (hole to hole). This dimension is standard across the entire Bell & Ross BR-03 collection and is critical for aftermarket strap compatibility. Verification with a ruler or digital calliper before purchasing any strap is essential to prevent incompatibility issues.

What is the best strap for the Bell & Ross BR-03 BR0392-AVIA-CA?

The optimal choice depends on intended use and personal preference. Alligator leather with natural grain creates visual contrast with the case's rigid geometry whilst maintaining aesthetic cohesion. Vegetable-tanned calf develops rich patina over time and offers versatility. Shell cordovan provides near-metallic lustre and superior durability. For extreme conditions, natural rubber or NATO fabric ensure flawless performance. At Casati Milano, each selection is personalised based on the wearer's context and aesthetic sensibility through bespoke consultation.

How do you change the strap on a Bell & Ross BR-03 BR0392-AVIA-CA?

The strap is secured via standard 20mm lugs on the case. To remove it, use a spring bar tool to compress the internal spring and release tension. Once the spring is compressed, slide the strap outward. Installation is the reverse procedure: insert the spring bar into both case holes and ensure it clicks securely into position. Should you lack familiarity with this procedure, Casati Milano offers professional installation services by appointment in Milan.

Are there compatible aftermarket straps for the Bell & Ross BR-03 BR0392-AVIA-CA?

Yes, any strap with a 20mm lug width is compatible with the BR0392-AVIA-CA. Milano Straps maintains a specialised collection of artisanal 20-millimetre straps, crafted in alligator, calf, shell cordovan and other premium materials. Each strap can be customised in length, colour, stitching type and monogramming. Casati Milano additionally creates bespoke straps with direct leather selection and WhatsApp updates throughout the manufacturing process.

How long does a leather strap last on the Bell & Ross BR-03 BR0392-AVIA-CA?

Longevity depends on material type, tanning method and usage patterns. Vegetable-tanned calf, with proper care, resists 5–8 years of wear. Shell cordovan, owing to the density of equine leather, can endure 10–15 years. Alligator, if handled correctly, guarantees 6–10 years. Natural rubber withstands 3–5 years. Regular maintenance—avoiding prolonged immersion, drying after moisture exposure, applying specific balms every 12–18 months—significantly extends longevity. Casati Milano provides 18-month warranty on all bespoke straps and offers regeneration and replacement services.

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