Strap for WilliamsF1 Team Day Date 42 Stainless Steel / Black / Bracelet

The lug width of the Oris Williams 01 635 7595 4164-07 8 25 01 is 20mm. This specification is critical when selecting a compatible strap: the lugs must embrace the watch case without excessive play. You can verify the measurement by observing the distance between the two spring bar holes on the sides of the case.

Selection depends on your style and usage. For understated elegance, an alligator strap with vegetable tanning in brown or cognac tones enhances the racing-inspired character of the watch. For sporting versatility, a Novonappa calf in grey or taupe maintains legibility and offers superior scratch resistance. For explicit technical identity, a NATO in navy blue with red accents echoes the Williams team livery. In summer, fluoroelastomeric rubber ensures waterproofing and consistent comfort.

Use a spring bar tool, available at specialist jewellers. Position the tool on the metal pins at the sides of the case, compress the spring and the pin will disengage from its seat. Remove the old strap, align the lugs of the new strap with the case attachments, and reinsert the pins until they click definitively into place. For a personalised service, the Casati Milano atelier offers installation by appointment.

Yes, absolutely. Any strap with a 20mm lug width is compatible. Milano Straps offers a curated selection of handcrafted straps in leather, NATO, and rubber, all tested for fit and comfort on Oris models of this size. The build quality of the aftermarket strap is decisive: well-finished lugs, leather with stable patina and robust spring bars ensure durability and reliability over time.

A high-quality leather strap with vegetable tanning typically lasts 3–5 years with daily wear, varying according to humidity, temperature and sun exposure frequency. Natural leather patinates and darkens over time: this is an aesthetic advantage, not a defect. Periodic maintenance—gentle cleaning and annual conditioning with specialist products—significantly extends longevity. Rubber or NATO straps offer superior durability (5–10 years) but less aesthetic versatility.