Strap for WilliamsF1 Team Day Date 40.5 PVD / Black / Rubber

The lug width of the Oris Williams 01 635 7560 4754-07 4 25 01B is 20 mm. This measurement corresponds to the distance between the two lugs where the strap is fitted. It is essential to verify this dimension before ordering an aftermarket strap, as an incorrect lug width will not fit properly on the case.

The ideal strap depends on usage and aesthetic preferences. For a formal-sporty context, Italian calf leather with a grain finish or vegetable-tanned alligator offers elegance and durability. For radically sporty use, a NATO strap in grey or navy fabric maintains fidelity to Williams heritage. For water and outdoor activities, structured rubber is the most technical choice. Milano Straps offers all these options in 20mm sizing.

The strap is changed using a specialised tool called a spring bar tool. Position the watch face-down on a soft cloth. Insert the flat tip of the tool into the lateral hole of the lug to loosen the internal spring and extract the pin. Repeat the operation on the other lug. Once both pins are free, the old strap slides off. Install the new strap following the reverse process, ensuring that the pins are fully inserted and the spring is under tension.

Yes, provided they are specific to the 20 mm lug width. Milano Straps offers high-quality artisanal straps in this dimension, made from selected leather, fabric and rubber. Mechanical compatibility is guaranteed. Construction quality and material selection ensure that the aftermarket strap can last over time and develop an aesthetic patina consistent with the prestige of the case.

The lifespan of a leather strap depends on the quality of the tanning, usage and maintenance. High-quality calf or alligator leather, subjected to moderate daily use, typically lasts 5-7 years. Prolonged exposure to humidity, chlorine or extreme temperature variations accelerates ageing. Regular maintenance with specific cleaning products and protection from mechanical stress extend service life. Milano Straps provides care advice for each material upon purchase.