Strap for Datejust 31 Rose Gold / Diamond / White - Roman / Oyster

The lug width of the Rolex Datejust 31 ref. 278285rbr-0007 is 16mm. This measurement is determined by the geometry of the Oyster case in 18kt Everose gold and remains consistent across the entire Datejust 31 family. To verify independently, place a digital calliper between the two lugs, flush against the case, and measure the clear distance between the metal projections.

For the Datejust 31 in Everose gold with a diamond-set bezel, an alligator strap with symmetrical scale pattern is the most coherent choice given the watch's formal register. Vegetable-tanned Box Calf leather is preferable for those seeking a strap that develops character over time. For everyday or active wear, a vulcanised rubber strap with a deployant clasp offers durability and comfort without compromising the overall aesthetic.

Replacing the strap on the Datejust 31 requires a 1.2mm flat-blade screwdriver or a dedicated springbar tool. The springbars are standard diameter; a forked-tip tool is recommended to apply leverage without scratching the Everose gold lugs. Work on a soft surface to protect the case and bezel. If in doubt, Casati Milano offers a professional fitting service at the Milan atelier by appointment.

Yes. Any strap with a 16mm lug width and standard springbars is compatible with the Datejust 31 ref. 278285rbr-0007. Milano Straps produces handcrafted aftermarket straps in a range of leathers and materials, with hand-trimmed lug ends to ensure precise fitment against the Oyster case. Material quality and finishing are comparable — and in many cases superior in terms of personalisation — to factory-fitted options.

The lifespan of a leather strap depends on material, care and frequency of use. A quality alligator strap with vegetable tanning, kept away from water and excessive perspiration and regularly treated with leather conditioner, can last between 3 and 7 years while retaining structural and aesthetic integrity. Cordovan tends to last longer due to the density of its fibre. Calfskin straps require more frequent replacement but develop a unique personal patina over time.