Strap for Modello Quattro U4S-HG Huckberry Earthform Collection

The lug width of the Modello Quattro U4S-HG is 22 millimetres. This measurement refers to the distance between the lateral shoulders of the case, proximal to the strap attachment pins. This is a fixed specification and cannot be modified, therefore any aftermarket strap must be ordered exclusively in 22mm size to ensure precise mounting and proportionate aesthetics.

For the Modello Quattro U4S-HG, we recommend straps in alligator with vegetable tanning, as the irregular grain of alligator leather dialogues elegantly with the austere satined case. Shell cordovan represents an equally refined alternative for those seeking a patina that evolves over time. For daily wear, vegetable-tanned calf offers balance between elegance and practicality. Recycled NATO and FKM rubber are valid options for sporting contexts or high-humidity environments, without compromising the tool watch identity of the timepiece.

The Modello Quattro U4S-HG strap is secured to the case via straight spring bars. To remove it: use a specialised tool (spring bar tool) to gently compress the pins from the lateral extremities of the case, proximal to the lugs. Once pressure is released, the pin slides horizontally out of its seat. Insert the new strap by aligning the holes with the pins and slide everything until you feel the closure click. A simple procedure, though we recommend performing it on a clean, well-lit surface to avoid damage to the case.

Yes, provided they are ordered in the correct lug width of 22 millimetres. Any 22mm strap mounted via standard spring bars is compatible with the Modello Quattro. No adapter is required. However, the quality of tanning and constructive precision of the strap significantly influence overall durability and aesthetic legibility of the pairing: we recommend prioritising manufacturers who guarantee material traceability and certified tanning techniques.

A natural leather strap with vegetable tanning (alligator, shell cordovan, calf) typically lasts 3-5 years of daily use, contingent upon environmental conditions (humidity, extreme temperatures) and frequency of cleaning. Leather tanned with vegetable tannins ages gracefully, developing patina and chromatic variations that amplify character over time. To extend durability, we recommend alternating straps on humid days, protecting from excessive perspiration, and subjecting the leather to conditioning treatments every 12-18 months. FKM rubber, by comparison, resists 5-7 years without visual degradation, but does not develop the aesthetic stratification that characterises natural fibres.