Strap for WilliamsF1 Team Day Date 40.5 Stainless Steel / Black / Rubber

The lug width of the Oris Williams 01 635 7560 4164-07 4 25 01 is 35mm. This is a non-standard measurement, so the strap must be selected with precision to ensure correct adaptation to the watch case lugs. Any deviation, however minor, compromises both aesthetic and functional fitting.

The choice depends on intended use. For elegance and natural patina development: vegetable-tanned leather in brown or cognac. For maximum formality: black alligator. For pure sportiness: heavy canvas NATO or grey anthracite vulcanised rubber. Shell cordovan represents a sophisticated balance between durability and aesthetic refinement.

Strap changing is a straightforward operation. Obtain a spring bar tool (small fork-shaped screwdriver) and position it in the designated slots found inside the case beneath the lugs. Press gently to extract the metal pins. Remove the old strap and insert the new one, ensuring the lug is perfectly aligned with the holes before reinserting the pins. Work carefully on a soft surface to avoid scratching.

Absolutely. Milanostraps offers a complete selection of artisanal 35mm straps compatible with the Oris Williams. A quality aftermarket strap actually provides greater aesthetic versatility than the original, as you can vary material and colour according to your preferences. The important thing is to verify that the strap is designed for 35mm lugs.

Durability depends on material and usage. Quality vegetable-tanned leather lasts 4-6 years under moderate daily use, developing a fascinating patina over time. Alligator has superior longevity (7-10 years) thanks to the natural structure of the skin. Shell cordovan achieves even 10-12 years. Rubber and NATO straps have variable lifespans (3-8 years) depending on quality and exposure to sun and humidity. Regular maintenance (cleaning and treatment with natural oils) significantly extends the life of any strap.