Strap for Datejust 31 Stainless Steel Diamond / Jubilee / White - Roman

The Rolex Datejust 31 ref. 278384rbr-0014 has a lug width of 16mm. This measurement, taken with a digital calliper at the inner opening between the two lugs, is the key parameter for selecting any compatible aftermarket strap.

For a white gold case with a diamond-set bezel, a Nile alligator strap in vegetable-tanned leather is the most coherent choice in terms of quality and texture. Shell cordovan is a refined alternative for a strictly formal aesthetic. Smooth calfskin or vulcanised rubber suit more casual daily wear whilst maintaining the water resistance of calibre 2236.

Strap replacement requires a 1.8mm springbar tool. Remove the two springbars securing the original bracelet to the lugs, then fit the new 16mm strap. The operation requires care: plastic-tipped tools are recommended to protect the white gold surfaces. Professional assistance from a watchmaker or Casati Milano atelier is advisable.

Yes. Any strap with a 16mm attachment and compatible springbars is technically mountable on the Datejust 31 278384rbr-0014. Milano Straps offers a curated selection of handcrafted 16mm straps available online or fully bespoke through the Casati Milano atelier, with custom colour and material options.

Longevity depends on material and usage. A quality vegetable-tanned alligator strap, properly maintained (nourishing cream every 3–4 months, kept away from prolonged moisture), retains structural and aesthetic integrity for 3 to 5 years of daily wear. Shell cordovan, due to its dense fibre structure, typically lasts even longer. All Casati Milano straps carry an 18-month warranty against manufacturing defects.