Bell & Ross · Instruments

Strap for BR-01 Tourbillon Skull

Takes 24 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width24 mm
Case diameter46 mm
ReferenceBR01-TOURB-AIRBORN
FamilyInstruments
MovementBell & Ross caliber BR-CAL.203 hours, minutes, small seconds
CaseTitanium

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 BR01-TOURB-AIRBORN

Selected for the 24 mm lug width · workshop selection

All 24 mm straps →

The Instruments BR01-TOURB-AIRBORN, seen from the bench

The Bell & Ross Instruments BR01-TOURB-AIRBORN is a 46mm titanium tourbillon watch embodying the Swiss brand's military and aviation heritage since 1992. It features the automatic BR-CAL.203 movement with a regulating tourbillon ensuring COSC chronometry. The asymmetrical dial, rotating bezel, and visible tourbillon through the sapphire caseback create a functional instrument designed for fighter pilots and aviation professionals. The 24mm lug width is precisely proportioned to the case diameter and internal movement placement, requiring straps specifically sized to these dimensions.

Frequently asked questions

What is the lug width of the Bell & Ross Instruments BR01-TOURB-AIRBORN?

The lug width of the BR01-TOURB-AIRBORN is 24 millimetres. This measurement is specific to the model and requires straps manufactured to this exact dimension. To verify it, place a flexible ruler on the straight section of the lower lug attachment, from side to side, without force. Milano Straps offers a curated selection of 24mm artisanal straps, ready to ship and customisable in leather, fabric, and finishes.

Which type of strap pairs best with the BR01-TOURB-AIRBORN?

For the BR01-TOURB-AIRBORN, the ideal strap must respect the timepiece's avionic and tactical identity. Crocodile leather in vegetable tanning with medium-fine grain creates sophisticated contrast against the titanium case whilst maintaining authority. Vegetally-tanned calf in brown or hazelnut tones evokes historical aeronautical heritage. A cotton-polyester NATO fabric in grey or black amplifies sportiness without distraction. Structured FKM rubber excels in high-humidity or maritime environments. Your choice depends on usage: for dress applications, orient towards alligator or fine calf; for sport, favour NATO or technical rubber.

How do I change the strap on a Bell & Ross Instruments timepiece?

Removing the BR01-TOURB-AIRBORN strap requires a spring bar tool to release the original strap from the lugs. Position the tool into the lateral holes beneath the lug, apply gentle pressure to compress the internal spring, and withdraw the bar. Repeat on the opposite lug. To install the new 24mm strap, align the spring bar with the holes, compress the spring again, and secure the strap. Verify that both sides are locked correctly. If preferred, the Casati Milano atelier offers professional fitting upon appointment.

Which aftermarket straps are compatible with the BR01-TOURB-AIRBORN?

The BR01-TOURB-AIRBORN accepts only straps with a lug width of 24 millimetres. Milano Straps supplies an artisanal range of 24mm straps, including crocodile, vegetably-tanned calf, NATO fabric, and structured rubber. All Milano Straps products are manufactured in Italy under rigorous quality control and available with personalisation of lengths, engraved initials, and stitching thread colour. Compatibility is assured for standard spring bar attachments.

What is the typical lifespan of a leather strap on a timepiece like the BR01-TOURB-AIRBORN?

A genuine leather strap, if properly maintained, typically lasts 3–5 years with moderate daily wear. Longevity varies by material: vegetably-tanned alligator, thanks to dense fibre structure, generally outlasts ordinary calf. Factors that reduce lifespan include constant humidity exposure, salty perspiration, direct UV rays, and lack of maintenance. To extend strap life, rotate your timepiece with at least two straps, dry promptly after water exposure, and occasionally apply a neutral protective balm. Milano Straps applies an 18-month warranty to all artisanal straps, covering manufacturing defects and craftsmanship.

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