The Titanium Field Guide

Heimdallr HMCR21 Bronze Yacht Diver

The Heimdallr HMCR21 Bronze Yacht Diver is a 44 mm bronze dive watch with a Seiko NH36A automatic movement.

All Heimdallr watchesDiver watchesMicrobrandLightest, ranked
Material
Bronze
Grade / type
Bronze (grade not stated)
Weight
97.3 g (with strap)
Water resistance
300 m
Type
Diver
Price
– · Not recorded: the listing is on Tandorio's store rather than Heimdallr's own, so no maker list price could be read
Case diameter
44.0 mm
Thickness
13 mm
Origin
China
Movement
Automatic
Caliber
Seiko NH36A
Complications
Date
Construction
Assembled
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Cowhide leather strap with buckle
Crystal
Sapphire
Display back
No
Dial
Green or black, each with a plain or engraved finish, date at 3
Dial colours
Black Green
Lume
BGW9 Super-LumiNova
Availability
Offered
Status
Current
Not published
Reference, Lug-to-lug, Power reserve, Colour, Hardness, Surface treatment, Caseback, Matching bracelet
Medium confidence Verified Oct 2026 Source: Tandorio store, Heimdallr HMCR21
Facts are free to cite with a link.
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Frequently asked questions

What is the case of the Heimdallr HMCR21 Bronze Yacht Diver made of?

The case is bronze (grade not stated). The guide has not yet confirmed it on the maker's own page.

What size is the Heimdallr HMCR21 Bronze Yacht Diver?

The case is 44 mm across and 13 mm thick. It is water resistant to 300 m.

How much does the Heimdallr HMCR21 Bronze Yacht Diver weigh?

About 97.3 g on its strap.

How much does the Heimdallr HMCR21 Bronze Yacht Diver cost, and is it available?

It is in production, but the maker does not publish a price.

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