Strap for TT1 Chronograph PVD - Ceramic / Black / Rubber

The lug width (misura ansa) of the Oris TT1 01 674 7659 4764-07 4 25 06B is precisely 25 millimetres. This measurement is unconventional in the sports chronograph landscape and represents a distinctive characteristic of this model. To verify your lug width accurately, measure the distance between the two horizontal pins that traverse the lugs: do not confuse this dimension with the thickness of the strap. Precision in measurement is essential to ensure correct strap compatibility.

For the TT1, we recommend three strap typologies. An alligator strap with vegetable tanning represents the most refined choice, creating an aesthetic dialogue between the natural grain of reptilian leather and the angular geometry of the steel and ceramic case. A superior-quality calf leather strap, also vegetable-tanned, offers an elegant solution that develops a rich patina over time. For a more pronounced sporting approach, we suggest a dark grey or black NATO strap that amplifies the pilot identity of the watch. Rubber with steel deployant represents the ideal option for marine environments or intense physical activities.

To change the TT1 strap safely, you will need a small pointed tool (spring bar tool). Position the watch with the strap facing downward on a soft, stable surface. Gently insert the tool tip into the hole located beneath the lug, compressing the internal spring to free the horizontal pin. Extract the pin from the first lug, then repeat the operation on the other side. Insert the new strap by aligning the holes with the pins, then ensure the pin is fully inserted and the spring has clicked into position. We recommend executing this operation with precision to avoid damage to the delicate case lugs.

Yes, it is possible to use compatible aftermarket straps, provided they feature a lug width of exactly 25 millimetres. Artisanal Milanese straps offer superior construction quality compared to standardised industrial solutions, guaranteeing longevity and a more refined aesthetic integration with the TT1 design. Always verify that the strap has been specifically manufactured for this measurement: never use 24mm or 26mm straps, as they may fit loosely or prove incapable of inserting correctly into the case lugs.

The lifespan of a leather strap depends on three factors: construction quality, frequency of use, and exposure to environmental conditions. An artisanal strap crafted from alligator or calf leather with quality vegetable tanning can last between 5 and 8 years with daily wear, developing a fascinating patina over time. Leather fears prolonged exposure to moisture and seawater, which accelerates fibre degradation. Regular maintenance, consisting of gentle cleaning with a damp cloth and occasional treatments with specific leather care products, significantly extends strap longevity. After its lifecycle concludes, you may replace the strap whilst maintaining your investment in the watch case.