The Bronze Field Guide

Unimatic Modello Quattro Bronze (x Massena LAB)

U4S-BRZ-ML Archive · used only

The Unimatic Modello Quattro Bronze (x Massena LAB) is a discontinued diver watch with a cusn8 bronze 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 Unimatic watchesBronze diver watchesCuSn8Skin-safe backDiversArchive
Price
$895
Alloy
CuSn8 marine bronze
Water resistance
300 m
Caseback
Titanium
Reference
U4S-BRZ-ML
Type
Diver
Case diameter
40.0 mm
Origin
Italy
Movement
Automatic
Caliber
Sellita SW200-1
Power reserve
38 hours
Complications
Time only
Construction
Assembled
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Strap
Crystal
Flat sapphire with inner AR coating
Display back
No
Dial
Foliage green
Dial colours
Green
Lume
Super-LumiNova GL old radium
Availability
No longer offered
Status
Limited edition of 400, sold out
Not published
Thickness, Lug-to-lug, Weight, Colour, Hardness, Surface treatment, Bronze bracelet
High confidence Verified Jul 2026 Source: Unimatic / Monochrome
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Unimatic Modello Quattro Bronze (x Massena LAB)

Zelos Swordfish Bronze 300mZelosSwordfish Bronze 300m$69942.0 mm13 mm thickDiversame category · same style · similar price · similar size
PrometheusPoseidon Bronze$75043.0 mm15.9 mm thickDiversame category · same style · similar price · similar size
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NodusAvalon II Bronze$74943.5 mm12.75 mm thickDiversame category · same style · similar price · same movementAncon Sea Shadow III BronzeAnconSea Shadow III Bronze$76043.5 mm16.5 mm thickDiversame category · same style · similar price · same movement

Frequently asked questions

What bronze alloy is the Unimatic Modello Quattro Bronze (x Massena LAB)?

The Unimatic Modello Quattro Bronze (x Massena LAB) has a cusn8 bronze case with a titanium caseback. This is confirmed against the maker spec.

What size is the Unimatic Modello Quattro Bronze (x Massena LAB)?

It is 40.0 mm in diameter, and water resistant to 300 m.

How much does the Unimatic Modello Quattro Bronze (x Massena LAB) 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 $895 when current.

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