Strap for Datejust 31 White Gold Fluted / President / MOP Roman

The Rolex Datejust 31 ref. 178279-0073 features a case with a lug width of 16mm. This measurement is specific to the 31mm Datejust Lady case and is the key parameter when selecting a replacement strap. To verify it, use a calliper to measure the internal distance between the two lugs.

For an 18-carat white gold case, a vegetable-tanned alligator strap — either Belly or Hornback cut — is the most coherent choice given the watch's positioning. Box-calf leather is a more understated alternative. A deployant clasp in white gold or brushed steel completes the pairing with refinement. For daily wear, fine-grain vulcanised rubber provides durability without compromising the silhouette.

Replacing the strap on a Datejust 31 requires a spring bar tool to remove the spring bars securing the bracelet to the lugs. Place the watch on a soft surface, insert the tool into the lug hole to compress the spring bar, and slide out the bracelet. The process is fully reversible and does not affect the movement or case. If in doubt, consult a qualified watchmaker.

Yes. Aftermarket straps in 16mm with curved or straight ends are compatible with the Datejust 31, provided they match the 16mm lug width and the Oyster lug curvature. Milanostraps.it offers a curated selection of handcrafted 16mm straps made specifically for this measurement, with materials and finishes suited to a white gold timepiece.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily use. A high-quality vegetable-tanned alligator strap, with proper care, can last between 3 and 6 years while retaining its structural and aesthetic integrity. Perspiration and prolonged water exposure are the primary causes of wear. Casati Milano straps come with an 18-month guarantee against manufacturing defects.