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Unimatic · Modello Due

Strap for Modello Due U2-F

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 diameter39 mm
ReferenceU2-F
FamilyModello Due
MovementTime Module caliber NH35A hours, minutes, seconds | date
Year2020
CaseStainless Steel

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 Due U2-F

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Due U2-F, seen from the bench

The Unimatic Modello Due U2-F is a 38.5mm stainless steel tool watch featuring a monochromatic dial with geometric stick indices and skeleton hands. It houses the Seiko NH35A movement and includes hours, minutes, seconds, and date functions. The brushed stainless steel case develops a natural patina with use. The 22mm lug width is a defining proportion of the Modello Due, requiring careful aftermarket strap selection. Materials like vegetable-tanned Tuscan calf, Hermès alligator, NATO nylon, or FKM rubber can be chosen based on functional contrast and aesthetic intent.

Frequently asked questions

What is the exact lug width of the Unimatic Modello Due U2-F?

The lug width of the Unimatic Modello Due U2-F is 22mm. This measurement is taken from the inner point of one lug pin to the other, and it determines strap compatibility. Since 22mm is not a standard width, aftermarket straps must be specifically sourced to fit this model correctly.

Which strap would you recommend for the Unimatic Modello Due U2-F?

The ideal strap depends on daily use and personal preference. For elegant everyday wear, we recommend vegetable-tanned Italian leather in natural brown with contrasting stitching: it develops an organic patina and offers natural grip. For active use or humid climates, FKM rubber in dark brown ensures full water resistance and minimal maintenance. A black NATO amplifies the watch's military heritage. The material choice must balance the Modello Due's minimalist aesthetics with practical functionality.

How do you change a strap on a 22mm lug width watch?

To change the strap: place the watch on a soft, stable surface. Use a spring bar tool to gently compress the lug pin from underneath, creating space to remove the old strap. Movement must be precise and slow to avoid scratching the case. Insert the new strap, aligning the holes with the lugs, then reinsert the pin. Verify that the strap is centred and firmly secured before wearing the watch.

Are there quality aftermarket straps available for 22mm lug width?

Yes, Milano Straps offers a specialised range of 22mm straps in vegetable-tanned leather, NATO, and FKM rubber. Each strap is tested for Modello Due compatibility and designed to maintain the watch's aesthetic proportions. Artisanal quality ensures durability and customisation options. Fast delivery and technical consultation support the right choice.

How long does a leather strap last on the Unimatic Modello Due?

A quality vegetable-tanned leather strap, with moderate daily use, typically lasts 2–4 years before replacement. Longevity depends on frequency of wear, sun exposure, humidity, and perspiration. Vegetable tanning develops a natural patina that improves over time, but fibres gradually lose elasticity. Rotating straps periodically extends individual piece life. Regular maintenance with natural balm can prolong durability.

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