Strap for Datejust 31 Stainless Steel / Domed - Diamond / Blue - Floral / Oyster

The Rolex Datejust 31 reference 278344RBR-0037 has a lug width of 16mm. This is a specific, non-standard size in the aftermarket strap sector, requiring dedicated production to ensure a proper fit to the case.

For a two-tone case in Oystersteel and white gold, the most suitable materials are alligator in cool tones (navy blue, slate grey, burgundy) and shell cordovan for those seeking a natural patina. A deployant clasp in steel or white gold is the most coherent closure with the watch's original design.

The strap is removed using a dedicated springbar tool or a lever-type tool. You need to compress the springbars connecting the strap to the case lugs. It is advisable to work on a soft surface to protect the dial and case, or to rely on a watchmaker or the Casati Milano atelier.

Yes. Milano Straps produces aftermarket straps specifically for the 16mm lug width of the Datejust 31, with shaped ends to respect the curvature of Rolex lugs. Available models can be found in the 16mm strap section of the catalogue.

Longevity depends on the material and usage. A quality alligator strap typically lasts 2–4 years with daily wear. Shell cordovan, thanks to its dense fibre structure, tends to last longer while developing a characteristic patina. All Casati Milano straps carry an 18-month warranty against manufacturing defects.