Strap for Modello Uno GMT Maxfield

The Unimatic U1S-GMT-M features a lug width of 22mm. This is the distance between the two small metal lugs (banches) on either side of the case where the strap attaches. To verify compatibility before purchase, measure with a digital calliper the horizontal space between the two attachment points; it must be precisely 22mm.

We recommend three primary options: an alligator strap in vegetable-tanned leather, tobacco brown or cognac shade, for formal elegance that harmonises with the blue-grey dial; Italian calf leather in vegetable tanning for those appreciating natural patina development and sustainable production; a NATO-style nylon strap in standard 22mm width for maximum versatility and ease of exchange. All are supplied ready-fitted at 22mm lug width.

Remove the watch from your wrist. Using a spring bar tool—the specialised Y-shaped implement with curved ends—gently lift the metal spring bar connecting the strap to the small lugs, working from underneath upwards. Once both attachment points release, the strap detaches completely. For installation, align the new strap's openings with the lugs, then press the spring bars until they click firmly into position. Verify both bars are seated before wearing the watch.

Absolutely, and it is indeed recommended practice. The 22mm lug width ensures compatibility with specialist strap manufacturers worldwide, not limiting you to official brand alternatives. You will reduce long-term expenditure by replacing the factory strap with equivalent or superior leather, rubber or fabric options. The essential requirement is verifying your chosen strap measures precisely 22mm at the lug attachment points.

A vegetable-tanned leather strap of quality construction, subjected to moderate daily wear, maintains structural integrity for 4–6 years before visible aesthetic wear becomes apparent (creasing, initial surface cracks). Actual longevity depends upon climate humidity, frequency of wear and basic maintenance: periodic cleaning with a damp cloth, avoiding prolonged water immersion, allowing natural air-drying after perspiration exposure. Alligator or shell cordovan straps endure considerably longer—7–10 years—due to superior fibre density and tanning resilience.