Rolex
Datejust 31 278344RBR-0032— lug 16mm

The Rolex Datejust 31 reference 278344RBR-0032 has a lug width of 16mm. This measurement is specific to the 31mm case and should be verified using a digital calliper placed between the inner lug terminals, flush against the Oystersteel and white gold case.

For a bi-material case with a rainbow diamond-set bezel, a vegetable-tanned alligator strap is the most technically coherent choice: the hornback or porosus texture contrasts the pavé surface without competing with the stones. Alternatively, shell cordovan offers a noble, understated patina. In both cases, a deployant clasp in white gold ensures material consistency with the case.

The Datejust 31 strap is replaced using a flat-tipped spring bar tool inserted into the lug hole to release the spring bar. As the case features 18-carat white gold components, it is strongly advised to use a tool with a coated or padded tip to prevent micro-scratches on the precious surfaces. The operation takes approximately 2–3 minutes per side.

Yes. Aftermarket straps with a 16mm attachment and straight ends are compatible with the Datejust 31 reference 278344RBR-0032. It is essential that the strap respects the 16mm lug width and that the spring bar diameter matches the original Rolex lug hole. Milanostraps.it offers a selection of artisanal leather straps in 16mm, available bespoke or from stock.

The lifespan of a leather strap depends on the material, tanning method, and daily use. A high-quality vegetable-tanned alligator strap, kept away from water, perspiration, and abrasion, will maintain its structural and aesthetic integrity for 3–5 years of regular wear. Shell cordovan, due to its dense fibre structure, can exceed 5 years. Milanostraps.it provides an 18-month warranty against manufacturing defects on all straps.