By Brent Robillard
Brand continuity
Early last year, I had the chance to spend some time behind the lens with the Archivo Uno from Trematic. It struck me then as a brand with a clear sense of design. The T-Five Beigua Maris represents a fairly significant shift in category, moving into dive watch territory, but it doesn’t abandon that identity. If anything, it carries it forward in a more robust, utilitarian form.
The model sent in for review is the Shadow variant, which sits alongside the Marina and Desert executions. Where those two lean more overtly into lume-forward dials, the Shadow feels more restrained—arguably the most “daily wearable” of the three.
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Key Features of the Trematic T-Five Beigua Maris
Case and wearability
The Beigua Maris is housed in a 39mm Grade 5 titanium case, measuring 11.3mm thick (13.8mm including the crystal) with a 45.5mm lug-to-lug. On paper, that lands squarely in the modern sweet spot for a compact diver, and on wrist it plays exactly as expected—balanced, light, and easy to wear over long stretches.
Grade 5 titanium brings the usual benefits: reduced weight, increased hardness, and a slightly darker hue than steel. Here, it’s finished with a fine sandblasted texture, broken up by polished and brushed accents across the case, bezel, and crown. The transitions are clean.
There’s a softness to the overall profile—helped along by the ultra-domed sapphire—that nods to mid-century skin divers. It’s a familiar silhouette, but not a derivative one.
Dial and design language
The dial is where the connection to the Archivo Uno becomes most apparent. The numeral font—slightly stylized but highly legible—carries over, and it does a lot of the heavy lifting in establishing brand continuity.
The Shadow variant uses a grey-to-charcoal degradé dial, paired with applied indices and BGW9 Super-LumiNova. It’s a more subdued execution than its siblings, but it benefits from that restraint. The bi-zonal layout, with its recessed inner minute track, adds a bit of depth without cluttering the dial.
Legibility is strong. The contrast is there, the handset is appropriately sized, and the minute track is easy to follow. Nothing feels forced.
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Bezel, crystal, and details
The unidirectional bezel is executed in Grade 5 titanium with a matte ceramic insert and 120 clicks. Engagement is firm and consistent, with enough resistance to feel secure. Alignment on the review piece was spot-on.
The crystal deserves mention. It’s a gently-domed sapphire with internal and external anti-reflective coating, and it plays a significant role in how the watch wears. There’s a slight distortion at extreme angles—expected with this profile—but it adds character rather than distraction.
Small details are handled thoughtfully: the curvature of the case, the proportion of the crown, and the finishing on the caseback all feel considered.
Movement
Inside is the La Joux-Perret G101, running at 28,800 vph with a 68-hour power reserve. It’s a solid, modern Swiss calibre that has been gaining traction across independent brands for its reliability and extended reserve.
In practice, it does exactly what you’d expect. It’s not the headline feature of the watch, but it supports the overall package well.
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Straps & Everyday Use
The Beigua Maris ships with a selection of straps, including FKM rubber and a waterproof textile option (featured here). I like the “textile” strap, in particular; it’s comfortable, durable, and in keeping with the tool-watch intent.
At 300 metres of water resistance, this is a capable diver on paper. In reality, it feels just as comfortable on land. That balance is often harder to achieve than brands make it seem, but Trematic gets it right here.
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Specs
| Case | Grade 5 Titanium 39mm Diameter 45.5mm Lug to Lug 11.3mm Thickness w/out Glass 20mm Lug Width Screw Down Crown & Caseback 300m Water Resistance |
| Dial & Crystal | Domed Sapphire Crystal Sector Dial Applied Markers Custom Handset BGW9 Super-LumiNova |
| Movement | La Joux Perret G101 24 Jewels 28 00bph 68-Hour Power Reserve |
| Strap | Waterproof Textile Strap & Tropic Style FKM |
Trematic T-Five Beigua Maris
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Final Thoughts & Pricing
I don’t expect anyone to reinvent the dive watch any time soon, but the T-Five Beigua Maris does a good job in refining it through material choice, proportion, and a consistent design language that ties back to the rest of the brand’s catalogue.
What stands out most is that sense of continuity. Even as Trematic moves into a more tool-oriented category, it hasn’t lost sight of what makes its watches identifiable. The Beigua Maris feels like a natural extension of the Archivo Uno.
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The Shadow variant, in particular, strikes a nice balance. It’s understated without being plain, capable without being overbuilt, and distinctive without relying on novelty. Over the course of time with it, that balance is what continues to hold your attention.
The watch is available from the brand website for $1869 CAD.
Brent Robillard is a writer, educator, craftsman, and watch enthusiast. He is the author of four novels. You can follow him on Instagram.
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