Unimatic · Modello Uno

Strap for Modello Uno U1-E

The Modello Uno U1-E 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-E
FamilyModello Uno
MovementTime Module caliber NH35A hours, minutes, seconds | date
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-E

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Modello Uno U1-E, seen from the bench

The Unimatic Modello Uno U1-E is a 41.50mm stainless steel tool watch featuring the Time Module caliber NH35A movement with hours, minutes, seconds and date. Designed with functional minimalism, the cylindrical case combines polished and brushed finishes. The 22mm lug width is engineered to ensure proper proportion between case and wrist without excess overhang, creating a harmonious transition between watch and wearer.

Frequently asked questions

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

The lug width of the U1-E is 22mm. This measurement represents the distance between the lug terminals on the case and is the definitive criterion for selecting compatible straps. Always verify this measurement before purchasing an aftermarket strap.

Which strap is most suitable for the Modello Uno U1-E?

For the U1-E, we recommend straps in vegetable-tanned leather (black, burnt brown, havana) as they emphasise the minimalist philosophy of the model. Alternatively, shell cordovan offers superior colour stability, whilst NATO and rubber represent pragmatic choices for high-stress applications. Your choice depends on intended use and personal colour preferences.

How do you change the strap on a Unimatic Modello Uno U1-E?

Strap replacement requires the use of a spring bar tool to remove the lug pins. Remove the previous strap by loosening the pins, then insert the new strap by aligning the lug terminals with the case holes. Ensure the new strap is 22mm wide to guarantee proper and symmetrical housing.

Which aftermarket straps are compatible with the U1-E?

All straps with a 22mm lug width are compatible with the U1-E. Milano Straps offers straps in Tuscan leather, shell cordovan, NATO and rubber, all available in this size. Always verify that your chosen strap is designed for 22mm to avoid misalignment or lug instability.

How long does a natural leather strap last on a watch like the U1-E?

A vegetable-tanned leather strap has an average lifespan of 3-5 years with regular use, extendable through periodic maintenance (cleaning, conditioning). Durability depends on usage intensity, environmental conditions (humidity, perspiration) and maintenance frequency. Shell cordovan tends to last longer due to its denser structure and resistance to wear.

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

The atelier's website: casatimilano.com