The Titanium Field Guide

Phoibos Proteus Bronze 300M

PY046A

The Phoibos Proteus Bronze 300M is a current-production diver watch with a cusn8 marine bronze case. At 121 g it sits around the middle for diver watches in the guide, and is priced well under the $1,299 median for the category.

All Phoibos watchesExotic-material diver watchesUnder $500MicrobrandLightest, ranked
Price
$375
Material
Bronze
Grade / type
CuSn8 marine bronze
Weight
121 g (head only)
Water resistance
300 m
Reference
PY046A
Type
Diver
Case diameter
42.0 mm
Thickness
13 mm
Lug-to-lug
49 mm
Origin
Hong Kong
Movement
Japanese automatic
Caliber
Seiko NH35
Power reserve
41 hours
Complications
Date
Construction
Assembled
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Leather strap with bronze buckle
Crystal
Domed sapphire with inner AR coating
Display back
No
Dial
Forest green (also navy, salmon, white)
Dial colours
White Blue Green Salmon
Lume
Super-LumiNova
Availability
Offered
Status
Current
Not published
Colour, Hardness, Surface treatment, Caseback, Matching bracelet
High confidence Verified Jul 2026 Source: Phoibos / Long Island Watch
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Frequently asked questions

What is the case material of the Phoibos Proteus Bronze 300M?

The Phoibos Proteus Bronze 300M has a cusn8 marine bronze case. This is confirmed against the maker spec.

What size is the Phoibos Proteus Bronze 300M?

It is 42.0 mm in diameter, 13 mm thick, 49 mm lug to lug, and water resistant to 300 m.

How much does the Phoibos Proteus Bronze 300M weigh?

About 121 g (head).

How much does the Phoibos Proteus Bronze 300M cost, and is it available?

It is current-production and lists from $375.

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