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 measures 40.0 mm across, and is water resistant to 300 m. Inside is the Sellita SW200-1 automatic movement, with 38 hours power reserve. Complications: Time only. Priced from $895. Brand origin: Italy. No longer offered new; listed here as an archive reference for the used market.

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

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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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