Rolex
Datejust 31 178274-0063— lug 16mm

The Rolex Datejust 31 ref. 178274-0063 features a lug width of 16mm. This measurement is standard across the entire Datejust 31mm line and should be verified with a digital calliper positioned internally between the two lugs before purchasing a replacement strap.

For the white Rolesor case of the Datejust 31, the most suitable materials are alligator leather in grey or navy blue for formal settings, box-calf in burgundy or green for everyday use, and shell cordovan for those seeking a distinctive personal patina over time. All straps must comply with the 16mm lug width and feature a straight or slightly tapered spring bar end.

To replace the strap on the Datejust 31, use a 1.5mm pin or fork spring bar tool to remove the spring bars from the Oyster lugs. Work on a soft surface to avoid scratching the white gold case. Alternatively, Casati Milano offers a strap-fitting service at the Milan atelier by appointment.

Yes. Milanostraps.it offers a curated selection of handcrafted aftermarket straps with a 16mm lug width, compatible with the Oyster lugs of the Datejust 31. Models are available in alligator, box-calf, shell cordovan and vulcanised rubber, with a pin buckle or deployant clasp in steel, crafted by Casati Milano using vegetable-tanned Italian leather.

The lifespan of a leather strap depends on the material and maintenance. A quality alligator strap, kept away from water and conditioned regularly, will last between three and five years with daily wear. Shell cordovan, owing to its dense fibre structure, is more resistant to longitudinal deformation and can exceed five years of use. Casati Milano straps in vegetable-tanned leather are covered by an 18-month manufacturing warranty.