Unimatic · Modello Due

Strap for Modello Due U2S-8O Tuscany

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

Lug width22 mm
Case diameter38 mm
ReferenceUWK-U2S-8O
FamilyModello Due
MovementSellita caliber SW200-1 b Hours, Minutes, Seconds
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 Due UWK-U2S-8O

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Due UWK-U2S-8O, seen from the bench

The Unimatic Modello Due features the automatic Sellita SW200-1 caliber with hours, minutes and seconds indication. The watch has 22mm lugs for the strap. The UWK-U2S-8O reference is part of the Italian brand's contemporary collection.

Frequently asked questions

What is the lug width of the Unimatic Modello Due UWK-U2S-8O?

The Unimatic Modello Due UWK-U2S-8O features a lug width of 22mm. This measurement, taken internally between the lug pins, is the standard for 38mm watches, ensuring balanced visual proportions. All compatible straps must have a 22mm width: always verify this specification before purchase.

What is the best strap for the Unimatic Modello Due UWK-U2S-8O?

The ideal strap depends on your daily use. For formal contexts, vegetable-tanned leather or hand-dyed alligator amplifies the minimalist aesthetic. For versatility, a cotton NATO offers immediate changeover and functionality. FKM rubber is the sportive choice, resistant to moisture. We recommend neutral tones (cognac, grey, black) that dialogue with the design's constructive rationality.

How do I change the strap on an Unimatic Modello Due?

The UWK-U2S-8O strap is replaced via removable pins that secure it to the lugs. Use a dedicated spring bar tool: position the tip in the lateral notch of the pin and apply gentle pressure downward and inward simultaneously. Once the pin is extracted, slide the old strap out. Repeat on the other side, then insert the new strap and pin.

Can I use an aftermarket strap on an Unimatic Modello Due UWK-U2S-8O?

Absolutely. Any strap with a 22mm lug width is compatible with the UWK-U2S-8O. Artisanal aftermarket straps, made from superior leather or crafted with traditional techniques, often offer greater aesthetic customisation than original straps. Always verify the ±0.5mm tolerance on lug width to ensure secure and stable fitting.

How long does a leather strap last on a watch like the UWK-U2S-8O?

The lifespan of a leather strap varies based on material, frequency of use, and climatic conditions. An artisanal vegetable-tanned leather strap, with proper maintenance (avoid prolonged moisture, occasionally apply leather cream), can last 3–5 years of daily wear. Alligator, more durable, can reach 5–7 years. The patina that develops over time is a desirable characteristic, a visible trace of the wearer's experience.

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