Strap for Modello Uno U1-B

The Modello Uno U1-B features a 22mm lug width. This is the historic standard for military tool watches, allowing for the use of thicker straps without compromising structural rigidity. To verify compatibility, measure the distance between the horizontal lugs on the case: 22mm is the internationally recognised standard.

This depends on your intended use and aesthetic preferences. Vegetable-tanned calf leather from Florence in tobacco brown accentuates the model's essential geometry, creating a timeless character. For a more functional approach, a slate-grey NATO or black FKM rubber strap offers durability and practicality. Tonally matched alligator represents the most refined constructive choice.

Use a spring bar tool or a blunt-tipped knife. Insert the lever into the gap between the case and lug, pressing upward to release the internal spring. Remove the horizontal pin and extract the old strap. Insert the new strap, ensuring the spring clicks securely into position, and verify the fit is secure before wearing the watch.

Yes, completely. The U1-B's 22mm lug width follows the international standard, meaning you can use any strap manufactured for this width. On Milano Straps you will find a curated selection of 22mm straps in leather, fabric, rubber and technical materials, all tested for mechanical and aesthetic compatibility with your watch.

Durability varies depending on material and usage. A vegetable-tanned calf strap, if maintained properly—cleaned with a damp cloth, treated with neutral oil every 6–12 months—can last 3–5 years before replacement. More precious materials such as shell cordovan have superior durability, lasting 7–10 years. NATO and rubber straps have virtually indefinite resistance, as they do not deteriorate through biological ageing.