Oris · Williams

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

Takes 25 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width25 mm
Case diameter42 mm
Reference01 635 7595 4194-07 8 25 01
FamilyWilliams
MovementOris caliber Oris 635 hours, minutes, seconds | date, day
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Williams 01 635 7595 4194-07 8 25 01, seen from the bench

The Oris Williams features the automatic Oris 635 caliber with hour, minute, second, date and day of the week indication. The movement provides the essential functions for daily use with the robustness typical of Swiss manufacture. The reference 01 635 7595 4194-07 8 25 01 is part of the collection dedicated to the Formula 1 team.

Frequently asked questions

What is the lug width of the Oris Williams 01 635 7595 4194-07 8 25 01?

The Oris Williams 01 635 7595 4194-07 8 25 01 features a lug width of 25 millimetres. This width is characteristic of motorsport-oriented sport models, proportioned to the 42-millimetre case diameter and ensures superior visual and structural solidity compared to narrower straps.

Which strap material pairs best with this model?

The 01 635 7595 4194-07 8 25 01 accommodates multiple interpretations. Alligator with vegetable tanning offers understated sophistication; chromate-tanned calf with medium grain translates the sporty aesthetic into urbane sensibility. For those wishing to preserve the racing DNA, a robust NATO or structured rubber strap guarantees aesthetic coherence and daily practicality.

How do I change the strap on the Oris Williams?

Changing the strap requires removal of the spring bars that secure the strap to the case lugs. Use a dedicated spring bar tool (pry bar) to lift the bar, then extract it gently. Repeat on both sides, then insert the new strap and fasten the bars. First-time installation by a qualified watchmaker is recommended.

Can I use an aftermarket strap on this watch?

Yes. Any quality strap with a 25-millimetre lug width is compatible with the 01 635 7595 4194-07 8 25 01. Milano Straps offers an extensive range of handcrafted straps in leather, NATO and rubber, all verified for this lug width and ready for dispatch.

How long does a leather strap last on a sports watch like this?

A quality leather strap with vegetable tanning or alligator develops patina over time and can last 5–8 years of regular use. Longevity depends on humidity exposure, frequency of use and maintenance. A rubber strap, alternated with leather, extends its lifespan significantly.

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