The Bronze 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. It measures 47.0 mm across, 14.5 mm thick, 44.8 mm lug to lug, 160 g, and is water resistant to 300 m. Inside is the Seiko NH35A automatic movement, with 41 hours power reserve. Complications: Time only. Priced from $199. Brand origin: China.

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

What bronze alloy is 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 alloy.

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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