Strap for Datejust 31 Yellow Gold / Diamond / Grey - Diamond / Oyster

The Rolex Datejust 31 ref. 278288rbr-0029 features a lug width of 16mm. This is a non-standard measurement compared to the more common 18mm or 20mm formats. To ensure a correct strap replacement, the lug width should be verified using a digital calliper placed between the two lugs at the point of contact with the case.

For an 18-carat yellow gold case such as that of the 278288rbr-0029, a vegetable-tanned alligator strap is the most formally coherent choice: the belly grain develops a patina over time that complements the precious metal. Box-calf leather offers a more versatile option for daily wear, whilst vulcanised rubber is recommended for sporting or aquatic contexts.

Replacing the strap on the Datejust 31 requires a suitable springbar tool or screwdriver compatible with 16mm spring bars. It is advisable to work on a soft surface to avoid scratching the yellow gold case. Casati Milano also offers an in-atelier fitting service by appointment, ensuring correct installation without risk to the original lugs.

Yes. Milano Straps offers a curated selection of aftermarket straps with a 16mm attachment specifically compatible with the Datejust 31. Available materials include alligator, calf leather, NATO fabric and vulcanised rubber, all fitted with 1.5mm spring bars suited to the original Rolex lug geometry.

The lifespan of a leather strap depends on the quality of the raw material, edge finishing and daily use. A high-grade vegetable-tanned alligator strap with hand-burnished edges and saddle stitching can last between three and six years with standard care. All Milano Straps products carry an 18-month guarantee against manufacturing defects.