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 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.

Titanium, ceramic, and bronze diver watchesBronzeDiversUnder $5,000
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
Material
Bronze
Grade / type
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
Matching 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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Alternatives to the Unimatic Modello Quattro Bronze (x Massena LAB)

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HelsonShark Diver 38 Titanium$75038.0 mmDiversame category · same style · similar price · similar sizeSeagull Ocean Series Pro Ice Wing Titanium 43mmSeagullOcean Series Pro Ice Wing Titanium 43mm$86943.0 mm13.5 mm thick110 gDiversame category · same style · similar price · similar sizeRedux & Co. HONNR A-9Redux & Co.HONNR A-9$99537.0 mm12.75 mm thickDiversame category · same style · similar price · similar sizeBaltic Aquascaphe TitaniumBalticAquascaphe Titanium$1,05041.0 mm13.3 mm thick55 gDiversame category · same style · similar price · similar size
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More titanium, ceramic, and bronze watches from Unimatic

Unimatic Modello Uno U1S-T-MPUnimaticModello Uno U1S-T-MP$1,17841.5 mm11.25 mm thick62 gDiverUnimatic Modello Due U2S-T-MPUnimaticModello Due U2S-T-MP$89938.0 mm58 gFieldUnimatic Modello Uno U1S-T-PD6-B ProDiverUnimaticModello Uno U1S-T-PD6-B ProDiver$1,90041.5 mm14.4 mm thick63 gDiverUnimatic Modello Uno U1S-TGMTUnimaticModello Uno U1S-TGMT$1,94940.0 mm57 gDiverUnimatic Modello Quattro U4S-T-LBUnimaticModello Quattro U4S-T-LB$1,66040.0 mm65 gFieldUnimatic Modello Uno U1S-T-SE (x Sease)UnimaticModello Uno U1S-T-SE (x Sease)–41.5 mm62 gDiver

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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