The Wristwatch 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 marine bronze case. It is priced under the $1,195 median for the category. No longer offered new; listed here as an archive reference for the used market.

All Unimatic watchesExotic-material diver watchesBronzeDiversUnder $5,000
Price
$895
Material
Bronze
Grade / type
CuSn8 marine bronze
Water resistance
300 m
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
Caseback
Titanium
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, Matching bracelet
High confidence Verified Jul 2026 Source: Unimatic / Monochrome
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Frequently asked questions

What is the case material of the Unimatic Modello Quattro Bronze (x Massena LAB)?

The Unimatic Modello Quattro Bronze (x Massena LAB) has a cusn8 marine 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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