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 measures 43.0 mm across, 15.9 mm thick, 52 mm lug to lug, and is water resistant to 3500 m. Inside is the Miyota 9015 japanese automatic movement, with 42 hours power reserve. Complications: Time only. Priced from $750. Brand origin: Portugal. No longer offered new; listed here as an archive reference for the used market.

Bronze diver watchesCuSn8Skin-safe backDiversArchive
Reference
Type
Diver
Price
$750
Case diameter
43.0 mm
Thickness
15.9 mm
Lug-to-lug
52 mm
Water resistance
3500 m
Weight
Origin
Portugal
Movement
Japanese automatic
Caliber
Miyota 9015
Power reserve
42 hours
Complications
Time only
Ceramic
CuSn8 marine bronze
Colour
Hardness
Construction
Assembled
Surface treatment
Caseback
Steel
Nickel-free
No (steel contact)
Bracelet / strap
Rubber strap
Ceramic bracelet
Crystal
Domed sapphire, inner anti-reflective coating
Display back
No
Dial
Black or blue matte
Lume
Super-LumiNova
Availability
No longer offered
Status
Archive (sold out; mid-2010s bronze-boom microbrand)
Medium confidence Verified Jul 2026 Source: WatchReport / Master Horologer Maker / listing ↗
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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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