Strap for Datejust 31 Rolesor Yellow Domed / Jubilee / Black MOP

The Rolex Datejust 31 ref. 178243-0070 has a lug width of 16mm. This dimension is fixed by the construction of the two-tone Rolesor case: any aftermarket strap must match this measurement precisely to ensure correct fitment and avoid lateral stress on the lugs.

For the Datejust 31 178243-0070 with its mother-of-pearl dial and yellow Rolesor case, a vegetable-tanned alligator strap in cognac or dark bordeaux offers the most coherent aesthetic and technical pairing. Shell cordovan is an equally refined alternative, developing a natural patina that complements the gold-steel two-tone finish over time. In both cases, the 16mm lug width calls for bespoke craftsmanship or a carefully curated selection of ready-made options.

To change the strap on a Rolex Datejust 31, the spring bars connecting the strap to the case lugs must be removed. Use a fine-tipped springbar tool, inserting it into the small notch on the inner side of each lug to compress the bar and release the strap. Always work on a soft surface to protect the Rolesor case from scratches. If in doubt, entrust the operation to a watchmaker or visit the Casati Milano atelier.

Yes, there are fully compatible aftermarket straps for the Rolex Datejust 31 178243-0070. The essential requirement is an attachment width of exactly 16mm. Milanostraps.it offers a curated selection of 16mm straps in various materials — alligator, calf leather, shell cordovan, rubber — crafted with the appropriate thickness and taper for the slim lugs characteristic of the 31mm Datejust case.

The lifespan of a leather strap depends on the material, tanning method and daily use. A vegetable-tanned alligator strap of artisanal quality, worn in rotation and kept away from prolonged water exposure, will maintain its structural and aesthetic integrity for 3 to 6 years. Shell cordovan, owing to the density of its fibre structure, can last considerably longer while developing a distinguished patina. Casati Milano provides an 18-month guarantee on manufacturing defects for all straps produced in the atelier.