Strap for Modello Quattro U4S-HM Huckberry Earthform Collection

The Unimatic U4S-HM features a 22mm lug width. This standard size is common among 40mm sports-elegant watches and offers considerable versatility in aftermarket strap selection, allowing you to easily pair leather, alligator, NATO, or technical rubber straps with your timepiece.

Strap choice depends on intended use. For formal and business settings, we recommend a black or dark brown alligator strap that emphasizes the minimalist austerity of the case. For daily wear, Tuscan vegetable-tanned leather in cognac tones offers elegance and practicality, developing natural patina over time. For outdoor activities or water sports, high-density nylon NATO straps guarantee maximum resistance and functionality without compromising aesthetics.

The strap is replaced by removing the spring bars that connect the strap to the case lugs. Using a dedicated spring bar removal tool or small lever, push inward to release the spring-loaded pin. Once removed, the old strap disengages easily. To install the new 22mm strap, insert the spring bars into the strap holes and align them with the case lugs, then snap the bar until you hear the security click.

Yes, all straps with a 22mm lug width are compatible with the Quattro U4S-HM. Quality aftermarket straps crafted from vegetable-tanned leather, certified alligator, NATO nylon, or technical rubber fit perfectly into the case lugs. It is essential to verify that the strap width completely covers the contact zone between case and lug to ensure aesthetic coherence and optimal mechanical security.

The durability of a vegetable-tanned leather strap depends on usage and maintenance. With moderate daily wear and proper drying after moisture exposure, a Tuscan leather strap can last 3-5 years before replacement becomes necessary. Alligator straps, owing to their denser fibre structure, tend to last longer. Regular practice of drying the strap after water contact and avoiding excessive flexing significantly extends product lifespan.