The Titanium Field Guide

Heimdallr H1 Bronze Tuna

HEIMDALLR-H1-BRONZE

The Heimdallr H1 Bronze Tuna is a current-production diver watch with a aluminium bronze case. At 160 g it sits among the heavier diver watches in the guide, and is priced well under the $1,299 median for the category.

All Heimdallr watchesExotic-material diver watchesUnder $500MicrobrandLightest, ranked
Price
$199
Material
Bronze
Grade / type
Aluminium bronze
Weight
160 g (with bracelet)
Water resistance
300 m
Reference
HEIMDALLR-H1-BRONZE
Type
Diver
Case diameter
47.0 mm
Thickness
14.5 mm
Lug-to-lug
44.8 mm
Origin
China
Movement
Automatic
Caliber
Seiko NH35A
Power reserve
41 hours
Complications
Time only
Construction
Assembled
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Solid stainless steel bracelet
Crystal
Sapphire
Display back
No
Dial
Black
Dial colours
Black
Lume
C3 Super-LumiNova
Availability
Offered
Status
Current
Not published
Colour, Hardness, Surface treatment, Caseback, Matching bracelet
Medium confidence Verified Jul 2026 Source: Heimdallr H1 Bronze listing
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Heimdallr H1 Bronze Tuna?

The Heimdallr H1 Bronze Tuna has a aluminium bronze case. It is recorded at medium confidence pending a maker-stated material.

What size is the Heimdallr H1 Bronze Tuna?

It is 47.0 mm in diameter, 14.5 mm thick, 44.8 mm lug to lug, and water resistant to 300 m.

How much does the Heimdallr H1 Bronze Tuna weigh?

About 160 g (w/ bracelet).

How much does the Heimdallr H1 Bronze Tuna cost, and is it available?

It is current-production and lists from $199.

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