Bell & Ross · BR-03

Strap for BR 03 93 GMT

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
ReferenceBR0393-GMT-ST/SCA
FamilyBR-03
MovementBell & Ross caliber BR-CAL.303 hours, minutes, seconds, Additional 24 hours Hand (adjustable) | date
Year2016
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 BR0393-GMT-ST/SCA

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The BR-03 BR0393-GMT-ST/SCA, seen from the bench

The Bell & Ross BR-03 BR0393-GMT-ST/SCA embodies the brand's aeronautical philosophy since 1992, transforming cockpit instruments into mechanical complications. The 42.00mm square steel case features the BR-CAL.303 caliber with an independent 24-hour GMT hand for dual time zone tracking. With a 20mm lug width and 316L stainless steel construction, this model delivers legible, austere design refined through four decades of French watchmaking heritage, beating at 21,600 vibrations per hour with certified accuracy of -4/+6 seconds daily.

Frequently asked questions

What is the exact lug width of the Bell & Ross BR-03 BR0393-GMT-ST/SCA?

The lug width of the BR0393-GMT-ST/SCA is 20mm. This dimension is standard across Bell & Ross square-cased models and permits access to a broad range of aftermarket straps. To verify this measurement accurately, position a metal ruler perpendicularly between the interior points of the lugs: the resulting figure will be 20mm.

Which type of strap is best suited to the Bell & Ross BR-03?

The BR-03 BR0393-GMT-ST/SCA pairs excellently with three categories: alligator for formal settings (neural grain structure, dry tactility), vegetable-tanned calf for synchronous ageing with the brushed case, and rubber or military NATO for celebrating the design's authentic aviation heritage. Selection depends upon intended use and wearing context.

How do I change the strap on my Bell & Ross BR-03 BR0393-GMT-ST/SCA?

The BR-03 features straight lugs anchored laterally to the case. To remove the original strap, use a spring bar tool or sufficiently robust needle: depress the bar pin from the opposite side until it disengages from the seat. Insert the new 20mm strap by aligning the holes to the lug housings, then reinforce the pin. Should you prefer professional assistance, consult a qualified horological service centre.

Are aftermarket 20mm straps genuinely compatible with the BR-03 BR0393-GMT-ST/SCA?

Yes, entirely. Any strap with correctly verified 20mm lug width is compatible with the BR0393-GMT-ST/SCA. Access Milano Straps' collection of 20mm straps: you will discover solutions in leather, rubber, NATO, customisable in dimensions and details, or commission a bespoke creation from the Casati Milano atelier.

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

A leather strap's lifespan depends upon wearing frequency, humidity exposure, and maintenance discipline. Under normal conditions (five-day weekly wear with strap rotation), a quality leather strap sustains 18–24 months before displaying significant aesthetic wear. Vegetable-tanned leather ages more elegantly, developing patina; industrial tanning more rapidly. The Casati Milano atelier offers an 18-month warranty on all bespoke straps.

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