Strap for Modello Tre U3-ULVN Undefeated

The Modello Tre UWK-U3-ULVN features a 22mm lug width. This measurement is essential for selecting compatible straps. You can verify it by measuring the distance between the inner shoulders of the lugs with a digital calliper, or by consulting the official Unimatic documentation.

For this chronograph tool watch, we recommend Italian vegetable-tanned leather in Havana brown or cognac tones: it creates elegant contrast with the brushed steel case and develops a beautiful patina with wear. Alternatively, a compact cotton NATO or black FKM rubber for sports scenarios.

Remove the current strap using a spring bar removal tool, available in universal kits. Insert the new 22mm strap into the lugs until mechanical lock is achieved. Ensure the strap is aligned symmetrically without excessive play. If the strap features a deployant clasp, anchor your wrist inside the leather before closing it.

Yes, all straps with a 22mm lug width are compatible. Milano Straps offers a dedicated range of models in Italian vegetable-tanned leather, NATO, and FKM rubber, selected to match aesthetically and functionally to this timepiece. Each strap is tested to ensure precise lug tolerances.

A quality vegetable-tanned leather strap typically lasts 2-4 years with daily wear, with variability based on climate, perspiration, and maintenance. Vegetable-tanned leather develops a fascinating patina over time, increasing aesthetic appeal. With proper care (regular drying, occasional conditioning with balm), longevity extends significantly.