Strap for Datejust 31 Rolesor Yellow Fluted / Oyster / Silver Diamond

The Rolex Datejust 31 ref. 178273-0040 features a lug width of 16mm. This measurement is specific to Datejust models with a 31mm case diameter. Any aftermarket strap must match this width precisely: even a 1mm deviation will prevent correct fitment or result in unwanted lateral play.

For the Datejust 31 178273-0040 in Rolesor yellow gold and steel, a vegetable-tanned alligator strap is the premier sartorial choice: the belly grain complements the Fluted bezel without competing with it. Shell cordovan offers an evolving patina and dense texture as an equally distinguished alternative. For sportier or more humid environments, a fine-grain vulcanised rubber strap maintains formal coherence with the Oyster case.

To replace the strap on the Datejust 31 178273-0040, a spring bar tool is required. Insert the forked tip into the slot of the spring bar, compress the spring, and slide the strap free from the 16mm lugs. The operation is fully reversible and does not involve the case or movement. It is advisable to work on a soft surface to avoid scratching the case.

Yes. The Datejust 31 178273-0040 accepts any aftermarket strap with a 16mm lug width and standard spring bars. Milanostraps.it offers a curated selection of handcrafted straps in alligator, calf leather, shell cordovan and rubber specifically sized for this reference. Casati Milano atelier also provides a fully bespoke service, with in-person leather selection and made-to-measure construction.

The lifespan of a leather strap on a Datejust 31 depends on the material, maintenance and frequency of wear. A quality vegetable-tanned alligator strap, kept away from water, excessive perspiration and direct sunlight, will retain its structural and aesthetic integrity for 3 to 5 years with daily use. Shell cordovan, owing to the density of its equine subcutaneous fibres, tends to last even longer while developing a distinctive patina. Casati Milano straps carry an 18-month warranty against manufacturing defects.