Oris · Williams
Strap for WilliamsF1 Team Day Date 40.5 Stainless Steel / Blue / Bracelet
Takes 35 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
The Williams 01 635 7560 4165-07 8 25 01, seen from the bench
Frequently asked questions
What is the exact lug width of the Oris Williams 01 635 7560 4165-07 8 25 01?
The lug width of the Oris Williams 01 635 7560 4165-07 8 25 01 is 35mm, measured externally between the two spring bar attachments on the case. This measurement is essential for selecting a compatible strap without the need for adapters. Casati Milano atelier verifies every lug width with certified digital callipers, guaranteeing a tolerance of ±0.1mm for a perfect fit.
Which strap is most suitable for the Oris Williams 01 635 7560 4165-07 8 25 01?
The Oris Williams 01 635 7560 4165-07 8 25 01 pairs naturally with high-quality alligator straps (belly, fine grain) for formal contexts, calf leather with vegetable tanning for daily elegance and aesthetic evolution, or NATO nylon canvas for sporting applications consistent with the model's racing heritage. Your choice depends on intended use and your desire for natural patina development over time.
How do you change the strap on this Oris model?
Strap replacement on the 01 635 7560 4165-07 8 25 01 involves extracting the two lateral spring bars that pass through the lugs of the case. Using a spring bar remover or dedicated tool, press the bar toward the centre of the case to release the retention hole. Once extracted, the existing strap slides free. The reverse process installs your new strap. For precision operations, Casati Milano atelier offers strap changes by appointment.
Is an aftermarket strap compatible with the Oris Williams 01 635 7560 4165-07 8 25 01?
Yes, any quality artisan strap designed for a 35mm lug width is compatible with the 01 635 7560 4165-07 8 25 01, provided it features stainless steel bars of the correct dimensions (typically 1.5mm diameter for watches of this category). Milano Straps offers a complete range of 35mm straps, tested for aesthetic and structural coherence with this Oris model.
How long does a leather strap last on the Oris Williams 01 635 7560 4165-07 8 25 01?
Leather strap durability depends on tanning method, usage intensity, and care. Calf leather with vegetable tanning typically lasts 3–5 years under moderate wear, developing noble patina over time. Quality alligator can exceed 7–10 years. UV exposure, perspiration, and humidity accelerate wear. Periodic cleaning with a soft dry cloth and controlled evaporation significantly extend strap lifespan.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only