Strap for Datejust 31 Stainless Steel Diamond / Jubilee / Black

The lug width of the Rolex Datejust 31 178384-0031 is 16mm. This measurement should be taken with a calliper positioned at the base of the lugs, between the two strap attachment points. This is the correct dimension to use when selecting aftermarket straps compatible with this reference.

For the Datejust 31 in two-tone Rolesor white, alligator belly straps in slate grey, midnight blue or taupe offer the finest aesthetic balance with the case. Shell cordovan is ideal for those seeking a patina leather for daily wear. Vegetable-tanned calfskin provides progressive personalisation over time. For the clasp, a deployant buckle in steel completes the ensemble with formal precision.

Replacing the strap on the Datejust 31 requires a dedicated springbar tool, inserted between the lug and the spring bar securing the strap. Applying gentle pressure compresses the bar and releases the strap. The operation is fully reversible and requires no case disassembly. It is advisable to work on a soft surface to avoid scratching the white gold case.

Yes. Milanostraps.it offers a curated selection of 16mm straps compatible with the Rolex Datejust 31 178384-0031, handcrafted in Italy. The models are calibrated to the typical lug profile of the Datejust 31 line, with curved or straight ends depending on the model. Leather, colour, stitching and clasp type can be fully customised at the Casati Milano atelier.

The lifespan of a leather strap depends on material quality, frequency of use and care. A high-grade alligator strap, worn regularly but not in sporting conditions, typically lasts between three and five years before requiring replacement. Shell cordovan, owing to its dense fibre structure, tends to last longer whilst developing a distinguished patina. Constant exposure to perspiration, water and direct sunlight significantly reduces its useful life.