Strap for Oris TT1 01 735 7651 4174

The lug width of the Oris TT1 model 01 735 7651 4174 is precisely 25mm. This dimension is measured internally, from the left shoulder to the right shoulder of the spring bar attachment. It is the fundamental parameter for identifying compatible straps. A digital calliper allows you to verify the measurement accurately without damaging the lug.

For the TT1 we recommend a high-quality alligator in caramel brown or black tones, which enhances the elegance of the case without competing visually. Alternatively, a vegetable-tanned calf leather in dark brown offers an evolving patina over time. For sportive contexts, a cotton-heavy NATO maintains continuity with the model's motorsport DNA. For water use, FKM rubber or neoprene ensures genuine practicality.

The TT1 uses a spring bar mechanism that allows for quick changes. Position a flat tool (spring bar tool) between the spring and the case, exerting slight downward pressure to release tension. The spring will snap downward, freeing the strap from its lug. Repeat from the other side. To install the new strap, insert the spring into the lug seat until you feel the locking click.

Yes, the TT1 accepts any strap with a 25mm lug width. Ensure that the strap has native 25mm lugs or use universal adapters. We advise against adapters for significantly different measurements (e.g. 24mm or 26mm) as they create unwanted play. Trust specialised craftsmen who guarantee precise tolerances and neat finishes.

A quality leather strap on a TT1 varies in durability based on usage and tanning method. An alligator or vegetable-tanned calf strap lasts 3-5 years with regular use, with a patina that improves over time. Longevity depends on frequency of use, ambient humidity and maintenance. Wash the strap every 2-3 months with warm water and neutral soap to extend its life. Avoid prolonged moisture and store in a cool, dry place.