Unimatic · Modello Uno

Strap for Modello Uno U1-BN

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
ReferenceU1-BN
FamilyModello Uno
MovementTime Module caliber NH38 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 Uno U1-BN

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Uno U1-BN, seen from the bench

The Unimatic Modello Uno reference U1-BN features the NH38 caliber with hour, minute, and second indication. The model has 22mm lugs for the strap. The construction follows the minimalist design principles typical of the Italian brand.

Frequently asked questions

What is the lug width of the Unimatic Modello Uno U1-BN?

The Unimatic Modello Uno U1-BN is fitted with a <a href="/pages/termine-glossario/misura-ansa">lug width</a> of 22 mm. This is the standard size for the model and ensures compatibility with an extensive range of artisan straps, from silk and cotton NATO straps to vegetable-tanned leather options. Always verify lug width measurements before purchasing an aftermarket strap.

Which strap do you recommend for the Modello Uno U1-BN?

For the Modello Uno U1-BN, we recommend straps that honour the watch's minimalist philosophy. Excellent choices include <a href="/pages/termine-glossario/concia-vegetale">vegetable-tanned</a> leather in natural tones (miel, tobacco, deep black), technical NATO straps in satin nylon, or FKM rubber straps with subtly textured surfaces. The 22 mm width permits versatile pairings without adding visual mass to the wrist. Avoid conspicuously decorated straps; the Uno's design demands sober, functional companions.

How do I change the strap on the Unimatic Modello Uno U1-BN?

Changing the strap on the Modello Uno U1-BN is straightforward. Use a spring bar tool to compress the spring pins within the lugs. Position the tool under the pin until it disengages from its housing, then remove the worn strap and insert the new one, aligning the holes. Ensure the pin is fully seated on both sides. If the lugs feature a <a href="/pages/termine-glossario/deployante">deployant</a> clasp, disconnect it before proceeding.

Which aftermarket straps are compatible with the U1-BN?

Any strap with a 22 mm <a href="/pages/termine-glossario/misura-ansa">lug width</a> is compatible with the Unimatic Modello Uno U1-BN. Milanostraps offers a curated selection of straps in calf leather, <a href="/pages/termine-glossario/alligatore">alligator</a>, <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a>, technical rubber, and NATO textiles. Every 22 mm strap fits perfectly within the lugs without play, guaranteeing both aesthetics and functionality. Browse the 22 mm collection to discover colour combinations and materials that enhance the Uno's design.

How long does a leather strap last on the Modello Uno U1-BN?

Leather strap durability depends on tanning method, thickness, and usage patterns. A traditionally <a href="/pages/termine-glossario/concia-vegetale">vegetable-tanned</a> leather strap lasts 3–5 years with moderate daily wear. If worn occasionally on a Modello Uno U1-BN, it may exceed 7–8 years. Shell cordovan straps are even more durable, often lasting 10–12 years. Leather absorbs perspiration and humidity; store it away from direct sunlight and replace it once visible cracks or tears appear in the curves.

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