Strap for Datejust 31 Stainless Steel / Yellow Gold / Fluted / Grey - Diamond / Oyster

The Rolex Datejust 31 reference 278273-0021 has a lug width of 16mm. This is a specific measurement for this 31mm case family, distinct from the 18mm of the Datejust 36 and the 20mm of the Datejust 41. For any strap replacement, only straps with a 16mm attachment must be used. The measurement can be verified with a digital calliper on the caseback between the two lugs.

For the Datejust 31 278273-0021 in yellow Rolesor, an alligator strap in dark brown or cognac is the most coherent choice given the watch's formal character. Alternatively, vegetable-tanned calf leather develops a distinctive patina over time, while shell cordovan offers superior longevity and a compact grain. For aquatic use, vulcanised rubber is recommended. A deployant clasp in yellow gold completes any combination impeccably.

Replacing the strap on the Datejust 31 requires a spring bar tool to remove the spring bars connecting the strap to the case lugs. The 16mm spring bars compress laterally to disengage. It is advisable to work on a soft cushion to avoid scratching the case and caseback. If you lack experience, the operation can be carried out free of charge by a watchmaker or directly at the Casati Milano atelier upon strap delivery.

Yes, the aftermarket offers straps compatible with the Datejust 31 278273-0021, provided they have a 16mm attachment. Milano Straps offers a dedicated selection of handcrafted straps in leather, rubber and other materials in 16mm, made with stitching and finishing designed for the Oyster case profile. Casati Milano bespoke straps are built to the client's wrist measurements, ensuring a perfect fit.

The lifespan of a leather strap depends on the material and frequency of use. A quality alligator strap, rotated with other straps, typically lasts 3 to 5 years before showing structural wear. Shell cordovan, thanks to its dense fibrous structure, can exceed 7 to 10 years. Vegetable-tanned leather develops patina but requires periodic conditioning with neutral cream. Milano Straps straps are covered by an 18-month warranty against manufacturing defects.