Bell & Ross · BR-03

Strap for BR 03 90 B-Rocket

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
ReferenceBR0390-B-ROCKET
FamilyBR-03
MovementSoprod caliber 9090 Hours, Minutes, Seconds | Big Date | Power Reserve Indicator
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 BR0390-B-ROCKET

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The BR-03 BR0390-B-ROCKET, seen from the bench

The Bell & Ross BR-03 BR0390-B-ROCKET embodies instrumental chronograph philosophy rooted in military aeronautical watchmaking. Its square case with ballistic indices and integrated asymmetric lugs reflects functional ergonomics from cockpit instruments. The 42mm stainless steel case houses the Soprod 9090 Swiss calibre, featuring hours, minutes, seconds, large date, and power reserve indicator. The 20mm lug width ensures proper proportions and secure strap attachment without lateral play. Sapphire crystal with anti-reflective coating and water resistance support demanding environments.

Frequently asked questions

What is the lug width of the Bell & Ross BR-03 BR0390-B-ROCKET?

The lug width is precisely 20 millimetres. This dimension is integrated into the case and non-adjustable. To verify aftermarket strap compatibility, measure the distance between the two attachment pins at the base of the case with a digital calliper or metal ruler.

What is the best strap for the Bell & Ross BR0390-B-ROCKET?

The choice depends on intended use. For classical elegance, we recommend alligator in black or brown with vegetable tanning. For daily wear and humid environments, Tropic rubber is unbeatable. If you seek patina and natural ageing, Italian calf offers the best compromise between aesthetics and durability over time.

How do you change the strap on the BR-03?

The BR-03 features asymmetric integrated lugs. To remove the strap, you require specific tools: a horizontal pin remover or a small hammer and steel punch. Position the watch on a soft surface, locate the lateral pins concealed within the lugs, and gently push them outward. This operation is discouraged for inexperienced users; we recommend strap change at an authorised centre.

Is an aftermarket strap compatible with the Bell & Ross BR0390-B-ROCKET?

Yes, provided the lug width is exactly 20 millimetres and the strap supports asymmetric integrated attachments. Milano Straps offers a collection of customisable 20mm straps that guarantee complete mechanical and aesthetic compatibility with the BR-03.

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

Duration depends on material and usage. An alligator or calf strap with vegetable tanning, with proper maintenance (periodic cleaning, annual conditioning), resists 3-5 years of daily use before significant wear appears. Rubber and shell cordovan have different replacement cycles: rubber tends to degrade after 2-3 years, cordovan is nearly indestructible.

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