The Titanium Field GuidePicks of the month

Prometheus Poseidon Bronze

Archive · used only

The Prometheus Poseidon Bronze was a 43 mm bronze dive watch with a Miyota 9015 automatic movement. Rated to 3,500 m, no other bronze dive watch in the guide goes deeper, out of 198. It is no longer made, so this page is a reference for buying one used.

All Prometheus watchesDiver watchesUnder $1,000Microbrand
Price
$750
Material
Bronze
Grade / type
CuSn8 marine bronze
Water resistance
3500 m
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
Finish technology
Natural finish
Caseback
Steel
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, Matching bracelet
Medium confidence Verified Jul 2026 Source: WatchReport / Master Horologer
Facts are free to cite with a link.
Reader reviews & photosContribute photo or review
See it in the interactive guideGet the monthly letterContribute a photo or review

Similar watches

Alternatives to the Prometheus Poseidon Bronze

Frequently asked questions

Is the Prometheus Poseidon Bronze nickel-free?

No. The caseback is steel, and steel carries nickel, so the guide does not list it as nickel-free.

What is the case of the Prometheus Poseidon Bronze made of?

The case is cusn8 marine bronze. The guide has not yet confirmed it on the maker's own page. The caseback is steel, not titanium.

What size is the Prometheus Poseidon Bronze?

The case is 43 mm across, 15.9 mm thick and 52 mm from lug to lug. It is water resistant to 3,500 m.

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

It is no longer made, so the only way to buy one is used. Its list price when it was in production was $750.

All Prometheus watches · Diver watches · All 1,942 watches

Learn: Titanium grades · Surface treatments · Why titanium scratches · How to read a spec

How we verify & grade · Image & Trademark Policy · Terms & Conditions · Privacy Policy

Report an error on this page · how corrections work