Strap for TT1 Day Date Stainless Steel - Ceramic / White / Rubber

The lug width of this Oris model is 25mm. This is an unconventional measurement, specific to oversized case designs. The measurement is taken from the inside of one lug to the inside of the other, perpendicular to the case body. It is essential to verify this dimension before purchasing an aftermarket strap to ensure constructive compatibility.

The choice depends on intended use and aesthetic preference. For sophisticated elegance, alligator or shell cordovan offer progressive patina and ageing. For sporty practicality, rubber is the most resistant to moisture and stress. NATO straps emphasise the racing vocation of the model. Calf leather represents a versatile aesthetic-functional compromise.

Strap replacement is performed by acting on the side lugs of the case. Using a specific tool (spring bar tool), compress the small internal tension springs on the lugs, releasing the existing strap. Once removed, insert the new strap by aligning the terminals with the lug seats and allow the springs to click into place. On models with 25mm lugs, it is advisable to operate with precision to avoid scratching the case.

No, absolutely not. The 25mm lug width does not permit tolerances: a 24mm strap would be too tight and would not fit correctly, whilst a 26mm strap would be too wide and create unwanted play. This is not an approximation in construction, but a non-negotiable technical specification.

The lifespan of a leather strap depends on the tanning method, usage and maintenance. Vegetable-tanned leathers, such as European alligator, retain structural integrity for 3-5 years of intensive daily use, after which stitching begins to fail. Shell cordovan lasts longer, up to 6-7 years. Rubber and synthetic fabrics, conversely, have virtually unlimited durability if not exposed to direct heat.