Bell & Ross has always drawn from cockpit logic: bold geometry, extreme legibility, functional intent. The BR-05 Blue Diamond Eagle 36mm, however, represents a deliberate departure from that foundation. It still carries the unmistakable round-within-a-square architecture, yet this time the brand reaches beyond instrumentation and into horological artistry. I approached it with genuine suspicion. Aviation watches set with diamonds sound, not only on paper, like a marketing exercise. After spending some thoughts, I changed my position – a guilty pleasure, one of my favourite sentimental approach of watchmaking, is always welcome. The BR-05 Blue Diamond Eagle earns its place not only through spectacle but also through the rigour and craft conviction hidden within every layer of its construction. This is a second iteration of the model, we talked about the first model here: Bell & Ross BR-05 Blue Diamond Eagle 36mm: When the Cockpit Reaches for the Stars.
Written in Stars
The dial starts with a rigid brass plate, onto which Bell & Ross bonds a sheet of aventurine glass, known as Goldfluss blue: a deep cobalt glass saturated with copper-based inclusions that produce a natural shimmer replicating a starlit sky. The origin of this material traces back to 17th-century Murano, where copper filings fell accidentally into molten glass, and the effect remains just as compelling today. Aventurine is fragile by nature, sensitive to temperature fluctuations and prone to micro-cracking under mechanical stress, so every cut, every drill, every operation demands specialised tooling and a level of precision that tolerates no improvisation.
Layered onto that surface are eighteen diamonds in three sizes. Twelve replace the hour indices entirely, and seven trace the Aquila constellation in astronomically accurate positions. The largest stone, sitting between 10 and 11 o’clock, represents Altair, the brightest star in that constellation. Each diamond occupies a custom four-prong brass setting secured into holes drilled directly through the aventurine. One miscalculated movement cracks the glass permanently. That specific combination of technical vulnerability and artisanal precision is precisely what separates a great dial from an expensive one.
Robust, Reliable
The BR-CAL.329 drives the watch, an automatic calibre operating at 28,800 vph and providing 54 hours of power reserve across 25 jewels. The movement’s architecture draws on the Sellita SW300-1 platform, a Swiss base Bell & Ross shares across the entire BR-05 36mm family. At EUR 8,500, the absence of a manufacture calibre is a fair point to raise. That said, the SW300-1 delivers genuine reliability, and Bell & Ross focuses its craft energy visibly on the dial rather than the bridges. The finishing of the movement stays functional: no Cotes de Geneve, no hand-bevelling visible through an exhibition caseback, because there is none. Instead, the solid caseback carries a laser-engraved Aquila constellation connecting the exterior artistry directly to the enclosed mechanism. The calibre measures 25.6mm in diameter and 3.6mm in height, running hours, minutes and central seconds.
Diamonds – a Guilty Pleasure
At 36mm wide and 8.7mm thick, the steel case holds firmly to the round-within-a-square principle Bell & Ross introduced with the BR-01 in 2005. Satin-finished surfaces alternate with selectively polished chamfered edges, producing a controlled interplay of light that avoids the monotony of a fully brushed or fully polished execution. The bracelet integrates directly into the case architecture, with polished central links contrasting the satin outer links, and a folding clasp completing the assembly. A screw-down crown with lateral guards, an anti-reflective sapphire crystal, and 100 metres of water resistance round out a case that wears genuinely well on smaller wrists without conceding structural authority.
Final Thought
Co-founder Bruno Belamich describes this watch as a genuine work of horological art, and on this occasion I find myself in agreement. The aventurine dial, the micron-drilled diamond settings, the astronomical accuracy of the Aquila constellation, and the considered case construction all point to a piece built with craft conviction that goes beyond cosmetic decoration. The official retail price sits at 6 400€, a considerable premium over the standard BR-05 36mm entry point of EUR 4,500, but one that the complexity of the dial and the precision of the gem-setting work fully justify.
So is the Bell & Ross BR-05 Blue Diamond Eagle 36mm a true aviation inspired watch? No but also a small yes! The BR-05 is an urban collection destined to be enjoyed without the rigour of a tool watch – the long standing creations from the French Maison. It is sourcing it’s origin from the brand’s design language but it goes further into ar territories that the classic aviation B&R watch could no go. So my thoughts are in much favour of this direction that Bell & Ross surprise us with an artistic, sensible side.
