The Wristwatch Field Guide

Heimdallr Bronze MM300

MM300-BRONZE

The Heimdallr Bronze MM300 is a current-production diver watch with a aluminium bronze case. It measures 44.0 mm across, 15.5 mm thick, 50 mm lug to lug, and is water resistant to 300 m. Inside is the Hangzhou 2565A automatic movement. Complications: Time only. Priced from $159. Brand origin: China.

Titanium, ceramic, and bronze diver watchesBronzeDiversUnder $5,000
Reference
MM300-BRONZE
Type
Diver
Price
$159
Case diameter
44.0 mm
Thickness
15.5 mm
Lug-to-lug
50 mm
Water resistance
300 m
Weight
–
Origin
China
Movement
Automatic
Caliber
Hangzhou 2565A
Power reserve
–
Complications
Time only
Material
Bronze
Grade / type
Aluminium bronze
Colour
–
Hardness
–
Construction
Assembled
Surface treatment
–
Caseback
Bronze
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Rubber waffle strap or leather strap, 20mm
Matching bracelet
–
Crystal
Sapphire
Display back
No
Dial
Black, blue, or green
Lume
Swiss C3 Super-LumiNova
Availability
Offered
Status
Current
Medium confidence Verified Jul 2026 Source: WR Watches Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Heimdallr Bronze MM300?

The Heimdallr Bronze MM300 has a aluminium bronze case with a bronze caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Heimdallr Bronze MM300?

It is 44.0 mm in diameter, 15.5 mm thick, 50 mm lug to lug, and water resistant to 300 m.

How much does the Heimdallr Bronze MM300 cost, and is it available?

It is current-production and lists from $159.

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