The Titanium Field GuidePicks of the month

Proxima Bronze MM300

Archive · used only

The Proxima Bronze MM300 was a 44 mm bronze dive watch with an NH35 automatic movement. On the maker's specification no steel touches the skin, so the guide lists it as nickel-free. It is no longer made, so this page is a reference for buying one used.

All Proxima watchesDiver watchesUnder $500Microbrand
Price
$259
Material
Bronze
Grade / type
CuSn8 marine bronze
Water resistance
300 m
Type
Diver
Case diameter
44.0 mm
Thickness
15.8 mm
Lug-to-lug
50 mm
Origin
China
Movement
Japanese automatic (Seiko TMI)
Caliber
NH35
Power reserve
41 hours
Complications
Date
Construction
Assembled
Finish technology
Natural finish
Caseback
Bronze
Nickel-free
Maker states none
Bracelet / strap
Rubber or leather strap (buyer choice)
Crystal
Sapphire with anti-reflective coating
Display back
No
Dial
Brown, green, silver and other variants
Dial colours
Silver Green Brown
Lume
Super-LumiNova
Availability
No longer offered
Status
Archive (reference retired; the maker is still trading)
Not published
Reference, Weight, Colour, Hardness, Surface treatment, Matching bracelet
Medium confidence Verified Sep 2026 Source: WR Watches Spec checksAlloy Jul 2026Price Jul 2026
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 Proxima Bronze MM300

More watches from Proxima

Frequently asked questions

Is the Proxima Bronze MM300 nickel-free?

On the maker's published specification, nothing that touches the skin is steel: the case, caseback, crown and strap buckle are all non-steel. The guide records what the maker publishes and has not tested the watch, so if you react to nickel, confirm the contact points with the maker before buying.

What is the case of the Proxima Bronze MM300 made of?

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

What size is the Proxima Bronze MM300?

The case is 44 mm across, 15.8 mm thick and 50 mm from lug to lug. It is water resistant to 300 m.

How much does the Proxima Bronze MM300 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 $259.

All Proxima watches · Diver watches · All 1,960 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