Strap for TT3 Day Date Titanium / Green / Rubber

The lug width of the Oris TT3 01 635 7589 7067-07 4 28 02T is exactly 20mm. This measurement determines compatibility with all straps: a 20mm strap must present a precise distance of 19.8–20.2mm between the spring bar attachment holes. Milano Straps tests every 20mm strap with a certified digital calliper to guarantee perfect mechanical fit on the titanium case.

For the TT3 we recommend three primary options: genuine alligator in dark brown tones for racing elegance, vegetable-tanned calf leather with natural grain for chromatic evolution over time, or dark grey NATO strap for tactical interpretation. Vegetable-tanned calf develops pronounced patina over 6–12 months, visually accompanying the titanium case's natural ageing. A titanium-plated deployante buckle completes the constructive coherence of the timepiece.

The strap is replaced using a spring bar remover tool (a specific lever for spring bar mechanisms) available in stainless steel. Insert the flat tip of the lever under the spring bar from the inside of the lug, applying light and constant pressure until the spring releases from the case hole. Remove the spring and old strap, then insert the new strap by aligning the holes with the spring. The spring should snap into position with an audible mechanical click. Avoid plastic levers on titanium to prevent scratching.

Yes, provided it is certified at 20mm. However, not all 20mm straps are equivalent: poor construction tolerance can generate unwanted play. Milano Straps supplies 20mm straps tested mechanically with guaranteed ISO tolerances, avoiding damage to the titanium case. Be wary of straps whose manufacturer does not certify dimensional precision: titanium is softer than steel springs, so improper spring tension can create permanent micro-scratching.

A high-quality alligator or calf leather strap lasts 3–5 years of daily wear, then requires leather regeneration (oiling, conditioning) for another 2–3 years. With vegetable tanning, leather improves aesthetically over time, developing patina whilst the fibre structure remains stable until environmental degradation occurs. The TT3 has an ultra-lightweight titanium case, so strap weight does not accelerate leather wear. Avoid prolonged saltwater immersion to prevent titanium oxidation and preserve leather colour.