Bell & Ross has a house method for keeping the BR-03 in the catalogue: take the square-in-a-circle case it has built for two decades and change one variable at a time. The Lum series is one of those variables, a heavy application of Super-LumiNova that has already run across several models. The new BR-03 GMT Green Lum points that treatment at the brand's dual-time watch.
The base is the BR-03 GMT that Bell & Ross updated in 2021, and the technical specification carries over unchanged. What is new is the dial and the lume, and the run is capped at 500 pieces.
The case is the one you already know
It is the standard BR-03: a 42mm by 42mm rounded square in satin-finished and polished steel, a circular dial opening inside it, and a screw at each corner, a shape Bell & Ross traces back to a cockpit instrument. At 11.3mm thick it is reasonably flat, water resistant to 100m, and covered by a flat anti-reflective sapphire. A bidirectional 24-hour bezel sits on top, and on this edition its insert is black polished ceramic with the scale printed in green-emitting Super-LumiNova C3.
Where the money went
The dial is a vertical green-to-black gradient, which Bell & Ross describes as a night sky lit by the aurora. The numerals, markers and hands carry the same pale green C3 as the bezel, and the hours and minutes hands are blackened rather than the polished steel used on the standard GMT, which gives the watch a more military look. The central seconds hand has an aeroplane-shaped tip, the 24-hour GMT hand is an openworked triangle, and the date sits in a round window at 4:30.
The GMT is the part worth reading closely
Inside is the calibre BR-CAL.303, based on the Sellita SW330-2. That makes this an office-style GMT rather than a traveller's one, and the distinction matters. The crown adjusts the central 24-hour hand independently, not the local hour hand. In practice you keep the main hands on home time and point the 24-hour hand at a second zone, which is useful for tracking somewhere you call rather than somewhere you fly to. A true traveller's GMT lets you jump the hour hand forward on landing and leave the running seconds untouched; this does not do that. It is the more common and cheaper arrangement, and worth knowing before you buy on the word GMT alone. The movement runs at 28,800vph, holds 54 hours, and has 25 jewels.
Price
The Green Lum comes on a black rubber strap, with an additional black synthetic fabric strap in the box, and is limited to 500 pieces at EUR 4,900. That is a modest premium over a standard BR-03 GMT for a gradient dial, a ceramic bezel and a full dose of lume, which is roughly what the Lum series has always asked. Details at bellross.com.
