Strap for Datejust 31 Stainless Steel Fluted / Oyster / Grey

The Rolex Datejust 31 ref. 278274-0015 features a lug width of 16mm. When purchasing aftermarket straps, it is essential to specify this measurement, as it differs from the more common 18mm or 20mm. Always verify with a digital calliper, measuring at the base of the case between the two lugs.

Given the two-tone Rolesor white configuration (Oystersteel and 18-carat white gold), a vegetable-tanned alligator or shell cordovan strap is the most appropriate choice for the dresswear character of this model. Recommended colours include midnight blue, bordeaux, and slate grey. The buckle or deployant clasp should be in polished steel or white PVD to complement the case metals.

To remove the original Oyster or Jubilee bracelet, a fine-tipped springbar tool is required. The springbars on the Datejust 31 have a diameter of approximately 1.5mm. Work on a protected surface (microfibre cloth) to avoid case scratches. If unfamiliar with the process, the swap can be carried out at the Casati Milano atelier by appointment.

Yes. Milanostraps.it offers a curated selection of 16mm aftermarket straps compatible with the Datejust 31, crafted in alligator, calf leather, and other premium materials. Compatibility is ensured by the 16mm lug width and the use of standard springbars. Casati Milano bespoke straps are shaped to the specific lug geometry of the model for a precise fit.

Longevity depends on material and usage. A vegetable-tanned alligator strap, when properly maintained and kept away from water, perspiration, and direct sunlight, will retain its structural and aesthetic integrity for 3 to 5 years of daily wear. Shell cordovan, owing to the dense fibre structure of the equine muscle, tends to last longer whilst developing a distinguished patina. Milano Straps straps carry an 18-month guarantee against manufacturing defects.