Unimatic · Modello Quattro

Strap for Unimatic Modello Quattro U4S-BRZ-MLL

The Modello Quattro U4S-BRZ-MLL Massena Lab takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width22 mm
Case diameter40 mm
ReferenceU4S-BRZ-MLL
FamilyModello Quattro
MovementSellita caliber SW200-1 b Hours, Minutes, Seconds
Year2022
CaseBronze, Stainless Steel
Water resistance300 m

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Standard spring bar · length 22 mm · Ø 1.8 mm double flange · fitted with quick release from the factory (source Unimatic) · industry standard, no brand part number

Modello Quattro U4S-BRZ-MLL Massena Lab — watch

What I'm asked about the Unimatic Modello Quattro U4S-BRZ-MLL

What strap size does the Unimatic Modello Quattro U4S-BRZ-MLL take?

The Unimatic Modello Quattro U4S-BRZ-MLL needs 22 mm between the lugs, usually 18 or 20 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Unimatic Modello Quattro U4S-BRZ-MLL be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Unimatic Modello Quattro U4S-BRZ-MLL?

Yes, in 22 mm leather. On a 40 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the Unimatic Modello Quattro U4S-BRZ-MLL?

A 22 mm calf strap, for every day. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only

The atelier's website: casatimilano.com

Updated on · by Antonio Zichichi