Strap for Datejust 31 White Gold Diamond / Green

The Rolex Datejust 31 reference 278289rbr-0015 has a lug width of 16mm. This is a non-standard measurement compared to the more common 18mm or 20mm, so it is essential to confirm this dimension before purchasing any aftermarket strap to ensure a precise fit without lateral play.

For a white gold case set with diamonds such as the 278289rbr-0015, a vegetable-tanned Mississippiensis alligator strap is the most formally coherent choice. The symmetrical belly grain complements the texture of the diamond-set bezel. Alternatively, polished smooth calf leather or shell cordovan offer elegance for everyday wear. A white gold deployant clasp completes the ensemble with consistent metal matching.

Replacing the strap on a Datejust 31 requires a spring bar tool or a 1mm precision pin to compress the spring bars housed within the lugs. It is essential to work on a soft surface to avoid scratching the white gold case. For cases set with diamonds, it is strongly recommended to entrust the operation to a qualified watchmaker or trained technician to prevent any damage to the stones or lugs.

Yes, compatible aftermarket straps for the Datejust 31 at 16mm do exist, though availability is more limited than for standard sizes. Milano Straps offers a curated selection of handcrafted 16mm compatible straps available online, as well as fully bespoke options through the Casati Milano atelier, where clients may select the leather in person.

The longevity of a leather strap depends on leather quality and conditions of use. A high-grade vegetable-tanned alligator strap, properly maintained and rotated with other straps, can last between three and seven years while retaining structural and aesthetic integrity. Prolonged exposure to water, perspiration or perfume accelerates deterioration: it is advisable to remove the leather strap before swimming or intensive physical activity.