Strap for Modello Uno U1S-M

The lug width (ansa width) of the Modello Uno U1S-M is 22 mm. This measurement is crucial for strap compatibility with the case. Any aftermarket strap must be specifically constructed for this width to ensure a precise fit between the lugs without any lateral play.

The ideal choice for the Modello Uno U1S-M is a vintage vegetable-tanned calf leather strap, preferably in tobacco or dark brown tones. This pairing respects the watch's minimalist aesthetic and develops a natural patina over time. NATO and FKM rubber straps are also compatible and offer a more utilitarian approach.

Strap replacement requires a spring bar removal tool. Gently insert the tool into the access hole between the case and the strap, compress the internal spring, and slide the old strap outward. Insert the new strap from the same direction, ensuring the spring bar clicks into position. We recommend performing this operation on a clean surface with dedicated tools to prevent case scratching.

No. The Modello Uno U1S-M is engineered specifically for 22 mm straps. Straps of different widths (20 mm, 24 mm, etc.) will not fit properly: they cause lateral movement, risk of loss, and potential damage to the case lugs. Lug width compatibility is non-negotiable.

Lifespan depends on usage intensity and tanning type. A professional-grade vegetable-tanned calf strap typically lasts 3–5 years with moderate daily wear, developing an attractive patina. Under intensive use or constant moisture exposure, durability may reduce to 2–3 years. NATO and FKM rubber straps last longer (5–10 years) but require periodic cleaning to prevent moisture accumulation.