Strap for Modello Quattro U4S-8B Venice

The Unimatic Modello Quattro UWK-U4S-8B features a 22-millimetre lug width. This measurement refers to the net distance between the two spring bar attachment points, excluding the thickness of the pins themselves. It is essential to verify this dimension before purchasing an aftermarket strap to ensure a perfect fit without mechanical play.

For the Modello Quattro, we recommend dark brown alligator straps for a formal aesthetic, or burnished vegetable-tanned calf leather for a more rustic and dynamic appearance. NATO straps in slate grey or military black underscore the tool watch heritage, whilst rubber in black represents the maximalist choice for daily wear. All 22mm straps from milanostraps.it are compatible.

To change the strap, position the watch case facing towards you. Use a spring bar tool or a flat, non-invasive implement to gently push the small elastic pin located inside each lug: the pin will retract, allowing you to extract the strap end. Repeat for the second pin. Insert the new strap by aligning one end to the first pin, press until you hear the click of engagement, then repeat for the second pin. Verify that both sides are securely positioned before wearing the watch.

The original Unimatic strap uses certified materials and proprietary construction that guarantees an exact fit on the 22mm lugs. Aftermarket straps from milanostraps.it, whilst scrupulously respecting the lug width, offer variety in materials (alligator, Tuscan vegetable-tanned leather, NATO, rubber), different thicknesses and customised finishes. The Italian artisanal quality of milanostraps.it ensures perfect mechanical fit and equivalent durability, with the advantage of a far broader aesthetic choice.

The durability of a leather strap depends on the tanning method and usage. A superior vegetable-tanned Tuscan leather, such as those offered by milanostraps.it, typically withstands 3–5 years of daily wear with rotation (frequent changes). Vegetable tanning develops a noble patina over time, improving aesthetically even as the leather softens. Alligator tends to last longer thanks to the structure of the scales. Rubber, if well maintained, can last 5–7 years. Seasonal rotation amongst multiple straps significantly extends the lifespan of each individual piece.