Rolex
Datejust 31 278248-0031— lug 16mm

The Rolex Datejust 31 reference 278248-0031 has a lug width of 16mm. This measurement is specific to the current generation of Datejust 31 and must be respected precisely when choosing an aftermarket strap, to ensure a correct fit without play or strain on the yellow gold lugs.

For the Datejust 31 278248-0031 in yellow gold, an alligator strap with vegetable tanning is the most coherent choice with the level of the timepiece: the natural grain complements the texture of the precious case. Shell cordovan is a refined alternative for those seeking a patina that improves with age. Both require a cut calibrated to the 16mm lug width.

Replacing the strap on the Datejust 31 278248-0031 requires a dedicated spring bar tool or appropriate screwdriver. The yellow gold lugs are delicate: it is advisable to use plastic protectors or adhesive tape on the case surfaces before operating, or to entrust the installation to a watchmaker or the Casati Milano service team.

Yes. The Rolex Datejust 31 278248-0031 accepts any aftermarket strap with a 16mm lug width and standard spring bars. Casati Milano produces bespoke straps calibrated to this measurement with a tolerance of ±0.1mm, available in alligator, calf leather, shell cordovan and rubber, with a pin buckle or deployant clasp.

The lifespan of a leather strap on a Rolex Datejust 31 depends on the quality of the tanning and daily use. A high-quality vegetable-tanned alligator strap, rotated with at least one spare strap and kept away from excessive perspiration and water, maintains its structural and aesthetic integrity for 3 to 5 years. Casati Milano offers an 18-month guarantee against manufacturing defects.