Strap for Datejust 31 Stainless Steel Fluted / Oyster / MOP - Roman

The lug width is 16 millimetres. This dimension is specific to the 31mm case with two-tone white gold and steel construction. Always verify with a caliper the internal distance between the two lugs before purchasing an aftermarket strap, as an incorrect width will create mechanical play or prevent pin insertion.

For a white mother-of-pearl dial and two-tone case, we recommend natural white alligator with white gold deployante, or light tan calf leather with vegetable tanning and steel buckle. These materials enhance the dial's iridescence without creating visual competition. Avoid shell cordovan and opaque leathers that would compromise aesthetic balance.

Remove the original strap using a spring bar tool. Gently push the pin from one side to release the spring, then withdraw the pin from its seat. Align the new 16mm strap with the lug holes, reinsert the pin until it seats with an audible click. Do not force: if the pin does not snap into place, the strap is not compatible.

Yes, provided it is constructed with certified 16mm lug width and OEM Rolex pins. A bespoke artisanal strap guarantees superior geometric compatibility and durability compared to mass-produced alternatives. Casati Milano manufactures 16mm straps with watchmaking-grade tolerances.

A high-quality artisanal alligator or calf strap, with proper maintenance, typically lasts 3–5 years. Longevity depends on climate, relative humidity, sun exposure, and frequency of wear. Vegetable-tanned leather develops patina consciously; chemically tanned leather shows more linear wear. Casati Milano's warranty is 18 months against manufacturing defects, not wear.