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Unimatic · Modello Quattro

Strap for Modello Quattro U4S-C-H Hodinkee

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Unimatic
Lug width22 mm
Case diameter42 mm
ReferenceUWK-U4S-C-H
FamilyModello Quattro
MovementTime Module caliber NH38 hours, minutes, seconds
Year2023
CaseTitanium, Forged Carbon

Spring bar

Swiss Standard universal spring bars

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

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Straps for the Modello Quattro UWK-U4S-C-H

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Quattro UWK-U4S-C-H, seen from the bench

The Unimatic Modello Quattro UWK-U4S-C-H is a 41.5mm tool watch combining forged titanium and composite carbon construction. Equipped with the Time Module NH38 automatic movement with hours, minutes, and seconds indication, it features a 22mm lug width. This technical synthesis reflects Italian watchmaking philosophy, where material choice and dimensional precision serve functional purpose rather than decoration.

Frequently asked questions

What is the lug width of the Unimatic Modello Quattro UWK-U4S-C-H?

The lug width (ansa width) of the Unimatic Modello Quattro UWK-U4S-C-H is 22mm. This measurement represents the standard for instruments in this dimensional category and permits both sporty and formal strap pairings without compromise in proportion.

Which strap is best suited for the Unimatic Modello Quattro UWK-U4S-C-H?

The Modello Quattro excels with three primary options: vegetable-tanned alligator for refined elegance with temporal patina evolution, nylon NATO for pronounced sporty character, or vulcanised natural rubber for demanding use scenarios. Selection depends on intended context and personal aesthetic preference.

How do you change the strap on a Unimatic Modello Quattro UWK-U4S-C-H?

The strap is changed by removing the spring bars (passanti) from the case lugs using a dedicated tool or small flathead screwdriver. Support the case properly during operation and insert the new strap by aligning the passanti precisely with the lug apertures, verifying complete bar closure.

Is an aftermarket strap compatible with the Modello Quattro UWK-U4S-C-H?

Yes, any strap with a 22mm lug width is compatible with the Modello Quattro UWK-U4S-C-H. Casati Milano provides bespoke artisanal solutions in alligator, calf leather, NATO, and rubber, all calibrated for this specific width, ensuring structural stability and gap-free lug seating.

What is the lifespan of a leather strap for the Modello Quattro UWK-U4S-C-H?

The durability of a vegetable-tanned leather strap depends on use intensity and climatic conditions. On average, with regular maintenance and protection from excessive moisture, a bespoke alligator or calf strap maintains aesthetic and structural integrity for 5-7 years. The patina that develops is a desired quality, not a defect.

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.

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