Rolex
Datejust 31 278245-0032— lug 16mm

The Rolex Datejust 31 reference 278245-0032 has a lug width of 16 mm. This measurement should be taken with a digital calliper inside the case lugs to ensure a tolerance accurate to a tenth of a millimetre, which is essential for any aftermarket strap fitment.

For a 31 mm Everose gold case, a smooth-belly alligator strap in bordeaux or midnight blue offers the most coherent aesthetic pairing. Vegetable-tanned calf leather is a versatile alternative that moulds well to the wrist over time. For sportier use, vulcanised rubber with a crocodile-embossed finish maintains a luxury feel without absorbing moisture.

Strap replacement requires a fine-tipped or forked spring bar tool to release the spring bars from the case lugs. Work on a soft surface to protect the bezel and case back. On a gold case, it is advisable to have the swap performed by a watchmaker or specialist atelier to avoid scratching polished surfaces.

Yes. Any strap with a 16 mm attachment and standard spring bars is dimensionally compatible. Milano Straps produces handcrafted aftermarket straps with a 16 mm lug width specifically made for this reference, available both as ready-to-ship options online and as fully bespoke pieces through Casati Milano.

Longevity depends on the material and frequency of use. A quality alligator strap, with regular conditioning (leather cream every 3–4 months) and rotation with other straps, typically lasts 3–5 years before showing structural wear. Shell cordovan and vegetable-tanned calf have similar lifespans. Frequent exposure to water and perspiration significantly shortens the leather's service life.