Unimatic · Modello Uno

Strap for Modello Uno U1S-HS Disney x Highsnobiety Fantasia

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

Lug width22 mm
Case diameter42 mm
ReferenceU1S-HS
FamilyModello Uno
MovementSellita caliber SW200-1 b hours, minutes, seconds
Year2022
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Modello Uno U1S-HS

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Uno U1S-HS, seen from the bench

The Unimatic Modello Uno U1S-HS is a 41.5mm stainless steel minimalist tool watch with a 22mm lug width, designed by Giovanni Moro and Simone Nunziato. It houses the Sellita SW200-1 b automatic movement and features a monochromatic dial with baton indices, sapphire anti-reflective crystal, and screw-down crown for 100-meter water resistance. The watch exemplifies Italian minimalist watchmaking philosophy, eliminating unnecessary elements while maintaining functional legibility and balanced proportions.

Frequently asked questions

What is the lug width of the Unimatic Modello Uno U1S-HS?

The Unimatic Modello Uno U1S-HS features 22mm lugs, the standard size for 41-42mm diameter watches. This dimension aligns with ISO 1512 international specifications and ensures compatibility with the vast majority of available straps. Measurement is taken from the centre of the upper lug to the centre of the lower lug.

Which strap is most suitable for the Modello Uno U1S-HS?

Given the minimalist and tool-oriented character of the Modello Uno, straps maintaining aesthetic restraint are recommended: vegetable-tanned leather in neutral tones (cognac, dark brown), NATO nylon in blue or black for sporty contexts, or rubber for frequent aquatic use. Alligator leather offers formal elegance, whilst calf leather provides narrative character with a patina that matures over time.

How do I change the strap on the Unimatic Modello Uno U1S-HS?

Strap replacement requires a dedicated tool (spring bar tool) or a pressurized pen. Insert the tool into the narrow channel between the lug and the strap passant, then apply calibrated pressure to compress the internal spring. Once compressed, the lug withdraws laterally. The process reverses to install the new strap. Perform on a soft surface to prevent damage.

Can I use third-party aftermarket straps on this watch?

Yes, the Unimatic Modello Uno U1S-HS employs standard 22mm lugs, fully compatible with quality aftermarket straps. Both established brands and boutique manufacturers offer 22mm straps. Ensure the passant width (the seat where the strap connects to the lug) is appropriate, typically 20-22mm for optimal results.

How long does a leather strap last on this watch?

A quality vegetable-tanned leather strap, worn daily on wristwatches like the Unimatic, typically lasts 3-5 years before requiring replacement. Longevity depends on factors such as sun exposure, humidity, frequency of use, and maintenance. The U1S-HS, being water-resistant only to 100m, is not ideal for frequent diving, which accelerates leather deterioration.

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