Strap for Datejust 31 Rolesor Yellow Fluted Diamond / Jubilee / Steel Roman

The lug width of the Rolex Datejust 31 reference 178313-0070 is 16mm. This measurement is taken on the inside of the Oyster case lugs, at the narrowest point where the strap makes contact. A digital calliper is recommended for an accurate reading within the correct tolerance.

For the Datejust 31 in Yellow Rolesor, an alligator strap with vegetable tanning — in bordeaux or tobacco — offers the most coherent aesthetic pairing. Shell cordovan is a refined alternative for those who prefer a compact, uniform surface. For more active use, vulcanised rubber in 16mm ensures grip and water resistance. A deployant clasp reduces leather wear over time.

The strap on the Rolex Datejust 31 is removed using a spring bar tool with a forked tip, inserted between the case lug and the strap hole to release the spring bar tension. Care must be taken to avoid scratching the 18-carat yellow gold lugs. A watchmaker's cushion is recommended, and those unfamiliar with the process should consult a watchmaker or visit the Casati Milano atelier.

Yes. Any strap with a 16mm lug width and a standard spring bar (1.8mm diameter, 16mm length) is compatible with the Datejust 31. Milanostraps.it offers handcrafted straps in alligator, calf leather, shell cordovan, NATO and rubber, all manufactured to a ±0.3mm tolerance for a precise fit without risk of microabrasion on the lugs.

The lifespan of a leather strap depends on the material, tanning method and conditions of use. A vegetable-tanned alligator strap, properly maintained and rotated with other straps, can last between 3 and 7 years whilst retaining its structural integrity and developing a fine patina. Shell cordovan, due to its dense fibrous structure, typically lasts longer. Prolonged exposure to perspiration, water and UV rays accelerates deterioration; leather straps are not recommended for sporting or aquatic use.