The Bronze Field Guide

Prometheus Poseidon Bronze

Archive · used only

The Prometheus Poseidon Bronze is a discontinued diver watch with a bronze cusn8 (copper-tin) case. It is priced above the $599 median for the category. No longer offered new; listed here as an archive reference for the used market.

All Prometheus watchesBronze diver watchesCuSn8Skin-safe backDiversArchive
Price
$750
Alloy
CuSn8 marine bronze
Water resistance
3500 m
Caseback
Steel
Type
Diver
Case diameter
43.0 mm
Thickness
15.9 mm
Lug-to-lug
52 mm
Origin
Portugal
Movement
Japanese automatic
Caliber
Miyota 9015
Power reserve
42 hours
Complications
Time only
Construction
Assembled
Nickel-free
No (steel contact)
Bracelet / strap
Rubber strap
Crystal
Domed sapphire, inner anti-reflective coating
Display back
No
Dial
Black or blue matte
Dial colours
Black Blue
Lume
Super-LumiNova
Availability
No longer offered
Status
Archive (sold out; mid-2010s bronze-boom microbrand)
Not published
Reference, Weight, Colour, Hardness, Surface treatment, Bronze bracelet
Medium confidence Verified Jul 2026 Source: WatchReport / Master Horologer
Facts are free to cite with a link.
See it in the interactive guide

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Frequently asked questions

Is the Prometheus Poseidon Bronze nickel-free?

No. At least one part that touches the skin is nickel-bearing steel (commonly the caseback or clasp), so the guide does not mark it nickel-free.

What bronze alloy is the Prometheus Poseidon Bronze?

The Prometheus Poseidon Bronze has a bronze cusn8 (copper-tin) case, though its caseback is steel. It is recorded at medium confidence pending a maker-stated alloy.

What size is the Prometheus Poseidon Bronze?

It is 43.0 mm in diameter, 15.9 mm thick, 52 mm lug to lug, and water resistant to 3500 m.

How much does the Prometheus Poseidon Bronze cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market, and it listed from $750 when current.

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