Strap for TT1 Engine Date Stainless Steel - Ceramic / Skeleton / Rubber

The lug width of the Oris TT1 01 733 7668 4114-07 4 25 06 is 20mm (measured between the inner edges of the lugs). This width is standard across the TT1 family and is engineered to maintain optimal proportions with the 43mm case diameter.

For the TT1, we recommend three primary options: alligator leather with vegetable tanning for technical elegance; thick calf leather for durability and natural patina development; a high-density nylon NATO strap for genuine sportiness. Your choice depends on intended usage and the aesthetic statement you wish to convey.

The TT1 uses straight 20mm lugs. Remove the old strap by pushing the spring bars out from the case ends (use a tapered pin tool or strap-change kit). Insert the new strap's spring bars, aligning them with the lugs, and secure with gentle pressure. Verify the strap is centred and does not rotate.

Yes, any strap with a 20mm lug width is compatible. Bespoke leather straps from Milano Straps, crafted to measure in premium materials, integrate seamlessly with the TT1 and enhance its technical character.

A quality leather strap with vegetable tanning lasts 3–5 years under daily wear, depending on climate and maintenance. The watch remains water-resistant even with leather straps; strap longevity depends on regular cleaning, drying after water exposure, and storage in dry conditions.