March LA.B has always been most convincing when it leans into the line between Biarritz surf culture and vintage-leaning watch design.
The new Belza Twin does exactly that, taking the brand’s 1970s-flavoured diver into bronze with a stronger technical brief and a playful nod to twin-fin surfboards.
It’s a compact, characterful dive watch with enough real specification to move beyond styling exercise.
At a glance
- March LA.B has introduced the Belza Twin, a pair of bronze-cased dive watches in black and green.
- The 40mm diver gets a 300-metre rating, ceramic bezel insert, box sapphire crystal and La Joux-Perret G100 automatic movement.
- Each watch is priced at USD 2,150 including tax and comes with both a French-woven textile strap and a black silicone strap.
A surf-world diver with a Biarritz landmark behind it
The Belza name comes from Villa Belza, the dramatic 19th-century house set above the Côte des Basques in Biarritz.
That location matters to March LA.B’s identity, since the beach below became one of the defining places for European surfing in the 1950s.
The “Twin” part of the name pushes the surf reference further.
It points to twin-fin boards, or “twinnies”, known for speed, agility and a looser feel than more stabilised fin layouts.
That theme fits the Belza’s personality well, because this isn’t a sterile instrument diver.
It’s a watch built around a real marine format, but with enough graphic character to feel closer to a surf shack in Biarritz than a saturation-diving manual.
Bronze, ceramic and a case built for the water
The Belza Twin keeps the collection’s 40mm case size, now executed in bronze with brushed surfaces and polished accents.
Bronze is a smart material choice here, not just because it suits the watch’s warm retro palette, but because it will develop a personal patina with wear.
The case measures 14.35mm thick, a slightly slimmer profile for the line, while water resistance rises to 300 metres.
A screw-down crown sits at 4 o’clock and carries deeply machined geometric detailing linked to March LA.B’s stylised M logo.
The broad unidirectional bezel has 120 clicks and is fitted with either a black or green ceramic insert.
Its incised markings are filled with bronze-coloured paint, tying the functional timing scale back into the case metal rather than breaking the design with stark contrast.
On the back, a screw-down steel caseback carries a relief engraving of Villa Belza in a central medallion.
Wave dials and a serious automatic calibre
The dial comes in black or green, with horizontal wave engraving that gives the surface depth without turning it into a novelty.
Bronze-coloured rectangular indices sit around the dial, each with broad Super-LumiNova centres for legibility.
The blunt hour and minute hands follow the same practical approach, while a lollipop seconds hand adds a familiar dive-watch flourish.
March LA.B also uses the flange for a precision track with spherical luminous plots, a detail that makes the dial feel more dimensional.
At 3 o’clock, the framed date window uses a black background and a bright green numeral for the “3”, a small eccentric note that suits the brand.
A box-shaped sapphire crystal with anti-reflective coating protects the dial and creates the peripheral optical distortion that collectors often associate with vintage acrylic crystals.
Inside is the La Joux-Perret G100, a Swiss automatic calibre assembled in Besançon, France.
Running at 4Hz, it offers hacking seconds, date display and a 68-hour power reserve, giving the Belza Twin a movement specification that feels well matched to its price point.
French-woven straps and everyday wear
Each Belza Twin is delivered on a black or green jacquard textile strap woven in France by Manufacture Julien Faure.
The strap choice is one of the more distinctive parts of the package, adding texture and a stronger French connection than a standard off-the-shelf option.
A black silicone strap is also included, which makes sense for a watch with 300 metres of water resistance and a surf-adjacent brief.
The steel pin buckle keeps things straightforward and practical.
Details & Specifications
| Brand | March LA.B |
|---|---|
| Model | Belza Twin |
| Case size | 40mm diameter, 14.35mm thickness |
| Case material | Bronze with brushed finish and polished accents |
| Bezel | Unidirectional 120-click bezel with black or green ceramic insert |
| Crystal | Box-shaped sapphire crystal with anti-reflective coating |
| Crown | Screw-down crown at 4 o’clock |
| Caseback | Screw-down steel caseback with Villa Belza relief engraving |
| Water resistance | 300 metres |
| Dial | Black or green with horizontal wave engraving |
| Lume | Super-LumiNova on markers and hands |
| Movement | La Joux-Perret G100 automatic |
| Frequency | 28,800 vibrations per hour, 4Hz |
| Power reserve | 68 hours |
| Functions | Hours, minutes, hacking seconds and date |
| Straps | Black or green French-woven jacquard textile strap, plus black silicone strap |
| Buckle | Steel pin buckle |
| Price | USD 2,150 including tax |
The Belza Twin works because March LA.B hasn’t treated surf culture as decoration alone.
Between the bronze case, strong water rating, textured dial and capable G100 movement, it’s a dive watch with personality and enough substance to be worn hard rather than simply admired from dry land.
