Strap for WilliamsF1 Team Day Date 40.5 Stainless Steel / Silver / Bracelet

The lug width is exactly 35mm, measured from the inner edge of one lug to the inner edge of the other. This is a specific dimension of this model, determined by the proportions of the 40.50mm case. Standard 20mm or 22mm straps are not compatible.

Alligator leather with tight grain offers the most coherent choice with the racing aesthetic. Vegetable-tanned calf provides natural ageing over time. NATO or FKM rubber straps are tactical solutions for intensive use and wet conditions.

Use a spring bar tool to gently remove the pins securing the strap to the lugs. Insert the new 35mm strap into the same lugs and carefully reinsert the pins until you feel a distinct click. Avoid forcing to prevent case damage.

Yes, provided they are specifically designed for a 35mm lug width. Milano Straps offers bespoke straps in leather, NATO, and rubber with lugs precisely calibrated for this Oris. Do not use straps of different widths.

A high-quality alligator or vegetable-tanned calf strap typically lasts 5-8 years with daily wear. Frequent water exposure (given the 300m water resistance) reduces leather durability. NATO or rubber straps offer superior longevity but require planned replacement every 3-4 years.