Strap for Modello Quattro U4 Classic

The lug width of the Unimatic Modello Quattro UC4 is 22 millimetres. This dimension, measured between the inner edges of the metallic lugs, represents the contemporary standard for 40mm diameter watches and enables compatibility with a vast range of specialised artisanal straps available in the global market.

The optimal strap depends on intended use and personal preference. For formal and professional contexts, we recommend an alligator with vegetable tanning in dark brown or black. For daily sporting use, woven NATO in military green or navy blue offers practicality and cohesive aesthetics. For those seeking maximum refinement, shell cordovan evolves over time towards fascinating amber tones.

Strap replacement requires a specialised tool called a spring bar tool. Position the tool on the small spring inside the lug, apply downward pressure to compress the spring, and slide the pin out of its housing. Reverse the procedure with the new strap, ensuring the pin is fully inserted into both lugs.

Yes, any strap with 22mm lug width is mechanically compatible with the UC4. However, we recommend selecting specialised manufacturers who understand tool watch design to ensure aesthetic coherence and construction quality proportionate to the watch's value.

Durability depends on material and tanning method. Vegetable-tanned alligator maintains structural functionality for 5-7 years with daily wear, evolving aesthetically towards dark patinas. Shell cordovan, denser, can last 8-10 years. Woven NATO straps easily exceed 10 years. All benefit from periodic maintenance and protection from extreme weather conditions.