The Wristwatch Field Guide

Trematic T-Five Beigua Maris

The Trematic T-Five Beigua Maris is a current-production diver watch with a grey grade 5 case. It measures 39.0 mm across, 11.3 mm thick, and is water resistant to 300 m. Inside is the La Joux-Perret G101 automatic movement. Complications: Time only. Priced from $1,300 (approx; EUR 1,200). Brand origin: Italy.

Titanium and ceramic diver watchesTitaniumDiversUnder $5,000
Reference
–
Type
Diver
Price
$1,300 · approx; EUR 1,200
Case diameter
39.0 mm
Thickness
11.3 mm
Lug-to-lug
–
Water resistance
300 m
Weight
–
Origin
Italy
Movement
Automatic
Caliber
La Joux-Perret G101
Power reserve
–
Complications
Time only
Material
Titanium
Grade / type
Grade 5
Colour
Grey
Hardness
–
Construction
–
Surface treatment
None
Caseback
Titanium
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
FKM rubber straps (two)
Matching bracelet
–
Crystal
Domed sapphire
Display back
No
Dial
Desert, Marina, Shadow
Lume
Lumicast
Availability
Offered
Status
Current
High confidence Verified Jun 2026 Source: Trematic Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Trematic T-Five Beigua Maris?

The Trematic T-Five Beigua Maris has a grey grade 5 case with a titanium caseback. This is confirmed against the maker spec.

What size is the Trematic T-Five Beigua Maris?

It is 39.0 mm in diameter, 11.3 mm thick, and water resistant to 300 m.

How much does the Trematic T-Five Beigua Maris cost, and is it available?

It is current-production and lists from $1,300.

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