Strap for Datejust 31 Stainless Steel Diamond / Jubilee / Pink MOP

The Rolex Datejust 31 ref. 178384-0047 has a lug width of 16mm. This measurement is taken between the two lugs at the strap attachment point using a digital calliper. It is specific to this case diameter and is not interchangeable with the 20mm lugs of the Datejust 36 or the 13mm lugs of the Lady-Datejust 28mm.

For the Datejust 31 with mother-of-pearl dial and white gold bezel, a vegetable-tanned alligator strap is the most coherent choice with the formal register of this reference. The belly grain creates a visual dialogue with the fluted bezel. Alternatively, polished box-calf leather or shell cordovan offer a refined sartorial character. A deployant clasp in steel or 18k white gold completes the pairing whilst preserving the strap's geometry.

To replace the strap on a Datejust 31, a dedicated springbar tool or fork-tip tool is required to remove the springbars from the 16mm lugs. Insert the tip into the small notch on the side of the lug, compress the spring mechanism and slide the springbar out. This should be done carefully to avoid scratching the steel or white gold lugs. For original Oyster bracelets with the Easylink system, the procedure differs and requires Rolex-specific tools.

Yes. The Datejust 31 ref. 178384-0047 accepts any aftermarket strap with a 16mm lug width and standard springbars. Milano Straps crafts bespoke straps in this specific size in alligator, box-calf, shell cordovan, NATO and rubber. It is essential to verify that the strap ends feature a curved profile to fit correctly against the Rolex lug geometry and ensure a secure, play-free fit.

The lifespan of a leather strap depends on the quality of the raw material, the tanning process and daily use. A top-grade vegetable-tanned alligator strap, properly maintained (avoiding prolonged moisture and applying a suitable leather conditioner), will typically last 2 to 4 years with regular wear. Box-calf straps have a comparable lifespan. Straps produced by Casati Milano carry an 18-month warranty against manufacturing defects.