Strap for Modello Cinque U5S-A

The lug width of the Unimatic Modello Cinque U5S-A is 22mm. This dimension is generously proportioned for a 36mm case, accommodating straps with considerable thickness and structure, ideal for full-grain leather straps or robust NATO weaves.

We recommend vegetable-tanned leather straps with pronounced natural grain: the colour contrast between patina development over time and the brushed stainless steel case creates a rigorous aesthetic symbiosis. Alternatively, a heavyweight cotton NATO or FKM rubber strap offers versatility without compromising solidity.

Remove the watch from your wrist. Using a spring bar tool, press downward on the elastic pin (spring bar) from inside the lug, maintaining contact with the tool tip. The pin will retract, allowing you to remove the old strap. Repeat for the second lug. Install the new strap by aligning the holes with the lug shoulders, then lower the spring bars until they naturally anchor.

Absolutely. The crucial factor is that the strap is specifically dimensioned for 22mm lug width. Reputable artisanal brands (such as those from the Casati Milano atelier) guarantee proportions coherent with the U5S-A: bodies that are not excessively thick, sober finishes, and rigorous manufacturing tolerances. A bespoke leather strap of excellence radically transforms the watch's character.

A full-grain vegetable-tanned leather strap, with ordinary maintenance (rapid drying after moisture exposure, occasional conditioning), maintains structural and functional integrity for 3–5 years of daily wear. The developing patina becomes part of the object's charm. Lugs and keepers may show wear after 5–6 years; at this point, a quality craftsman can regenerate the strap by replacing worn components.