Strap for Datejust 31 Stainless Steel/ Rose Gold - Diamond / Silver - Floral / Jubilee

The Rolex Datejust 31 reference 278381RBR-0032 has a lug width of 16mm. This is a non-standard size within the luxury strap market: it is essential to ensure that any replacement strap features pre-curved ends compatible with the profile of the original Rolex lugs, guaranteeing a precise, play-free fit.

For a two-tone case in Everose gold and Oystersteel such as that of the Datejust 31 278381RBR-0032, a vegetable-tanned Mississippiensis alligator strap is the most aesthetically coherent choice: the natural scale texture and the patina that develops over time complement the refinement of the diamond-set bezel beautifully. Box-grain calf leather offers a more formal profile, while vulcanised rubber provides maximum everyday versatility.

Replacing the strap on a Rolex Datejust 31 requires a suitable springbar tool or lever sized for the 16mm lugs. Compress both ends of the springbar to release the original strap from the lugs, working carefully to avoid scratching the case. It is advisable to work on a soft surface and, if inexperienced, to entrust the operation to a watchmaker or specialist atelier.

Yes: high-quality aftermarket straps are available specifically made for the 16mm lug width of the Datejust 31. Milano Straps offers a curated selection of compatible straps in various materials — alligator, calf, NATO, rubber — with pre-curved ends suited to the Rolex case profile. It is important to avoid generic flat 16mm straps, which may not seat correctly against the lugs of this model.

The lifespan of a leather strap depends on the material, tanning method, and usage. A quality vegetable-tanned alligator strap, properly maintained (conditioning cream every 2–3 months, protection from water and perspiration), can accompany the watch for 3–5 years while retaining structural and aesthetic integrity. Calf leather tends to have a slightly shorter service life, whereas shell cordovan is among the most durable materials due to its dense fibre structure. Casati Milano offers an 18-month guarantee against manufacturing defects.