Strap for TT1 Day Date Stainless Steel / Grey / Bracelet

The Oris TT1 in reference 01 735 7651 4163-07 8 25 10 features an integrated lug width of 20mm. This dimension is precise and non-negotiable: the strap must pass through the steel lugs with neither excessive force nor lateral play. To verify compatibility, measure carefully from the inner edge of one lug to the inner edge of the other using a metal ruler.

The choice depends on your intended use and aesthetic preference. For an elegant-sporty profile, we recommend shell cordovan or vegetable-tanned calf leather, both of which age beautifully, developing natural patina. If you favour pure racing character, a tactical NATO in reinforced nylon or cotton offers minimalist functionality. For intensive use or humid environments, FKM rubber is unmatched: waterproof, thermoregulating, and maintenance-free. All materials are available in 20mm on MilanoStraps.

The Oris TT1 features integrated lugs, so replacement requires precision. Position the watch with lugs facing towards you and use a spring bar tool to compress the lug spring. Insert the tool into the small lateral hole of the lug, compress gently, and slide the strap outward. For the new strap, align the hole to the lug, compress the spring again, and insert the strap until it clicks. Never force: a correctly sized 20mm strap slides with controlled ease.

Yes, all quality 20mm straps comply with ISO 1413 standard, ensuring mechanical compatibility. However, compatibility does not guarantee aesthetic or qualitative equivalence. A budget strap will have non-standard thickness, unsuitable buckle, and poor leather. MilanoStraps straps are constructed to precise tolerances using premium materials: the result is zero play, no accelerated lug wear, and most importantly, aesthetics consistent with the TT1's racing character and case refinement.

A high-quality leather strap (cordovan or vegetable-tanned calf) lasts an average of 3–5 years with daily wear and proper maintenance. Longevity depends on sun exposure, humidity, cleaning frequency, and bending technique. To maximise durability: keep the strap dry, avoid prolonged moisture, rotate the watch (do not always use the same lug), and periodically condition the leather with appropriate products. A well-maintained strap develops desirable patina and ages nobly, becoming part of your watch's history.