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

The lug width is 20 millimetres. This dimension is critical for aftermarket strap compatibility. You can verify it by measuring the spacing between the lugs with a digital calliper or by consulting the official Oris documentation.

It depends on intended use and aesthetic preference. For formal elegance, we recommend black alligator or vegetable-tanned calf leather. For sports versatility, a high-density polyamide NATO strap. For moisture resistance, FKM rubber or medical-grade silicone. All these materials are available in 20mm width.

Use a spring bar tool (with two rounded ends) to gently compress the elastic pin that holds the strap to the lugs. Press from underneath towards the case body, lift the strap, and slide out the pin. Alternatively, contact Casati Milano for bespoke in-atelier service.

Any artisanal strap featuring standard 20mm lugs is compatible. Milanostraps offers a comprehensive selection in calf, alligator, shell cordovan, and rubber—all in the same width and fully customisable according to your colour and material preferences.

A quality artisanal leather strap on a sports watch like the Williams typically lasts 3–5 years with daily wear, depending on ambient humidity and maintenance routine. Leather naturally develops a patina that improves its aesthetic over time. Consult Milanostraps guidelines for best conservation practices.