Rolex
Datejust 31 178243-0025— lug 16mm

The Rolex Datejust 31 ref. 178243-0025 has a lug width of 16mm. This measurement is taken with a digital calliper positioned between the two lugs at the strap insertion point. Respecting this specification is essential to ensure a precise fit and prevent lateral play between strap and case.

For the Datejust 31 178243-0025 in steel and yellow gold, an alligator strap with vegetable tanning in cognac or dark brown tones best complements the two-tone case. Box calf leather is ideal for refined daily wear, while shell cordovan develops a distinctive patina over time. All straps must feature a straight 16mm end to fit the Oyster lugs correctly.

To replace the strap on a Datejust 31, use a dedicated springbar tool or lever to release the springbars from the case lugs. The springbars measure 16mm in usable length. Always work on a soft surface to protect the 904L steel case and yellow gold bezel from scratches. If in doubt, the operation can be carried out by a watchmaker or by the Casati Milano atelier team.

Yes, a wide range of high-quality aftermarket straps are compatible with the Datejust 31 178243-0025, provided they feature a 16mm lug width and a straight profile suited to Oyster-style lugs. Milano Straps and the Casati Milano atelier craft bespoke straps in alligator, calf, shell cordovan and rubber specifically tailored to this reference, with deployant clasp or traditional buckle options.

The lifespan of a leather strap depends on the material, tanning method and frequency of use. A vegetable-tanned alligator strap, properly maintained, typically lasts between three and seven years with regular wear. Shell cordovan, owing to its dense fibrous structure, tends to last even longer, developing a desirable patina. Regular exposure to water and perspiration accelerates deterioration; for a Datejust worn in active contexts, alternating with a rubber strap is recommended.