Strap for Datejust 31 Stainless Steel / Yellow Gold / Fluted / Champagne - Diamond / Oyster

The lug width of the Rolex Datejust 31 ref. 278273-0025 is 16 mm. This measurement is determined by the 31 mm case diameter and the geometry of the Oystersteel and yellow gold lugs. To verify it, measure the internal distance between the two lugs at the base of the case using a millimetre calliper.

For the Datejust 31 278273-0025 in yellow Rolesor, vegetable-tanned alligator leather is the most coherent choice: the scale grain and ability to develop a patina complement the yellow gold bezel. Smooth calfskin in burgundy or midnight blue offers a more contemporary alternative, while cognac shell cordovan is the most bespoke selection for long-term daily wear.

To replace the strap on the Datejust 31, you need to remove the spring bars securing the strap to the case lugs. Use a bifurcated spring bar tool, inserting the forked tip into the lug slot to compress each spring bar and release it. Work on a soft surface to avoid scratching the case. The new 16 mm strap is fitted by reversing the process.

Yes. Any strap with a 16 mm lug width is technically compatible with the Datejust 31 ref. 278273-0025. Milano Straps offers a curated selection of handcrafted straps in alligator, calfskin, shell cordovan and technical materials in the 16 mm size, fitted with steel or yellow gold PVD buckles and deployant clasps to maintain visual coherence with the Rolesor case.

The lifespan of a leather strap depends on the material, tanning quality and daily use. A high-quality vegetable-tanned alligator strap, properly maintained (conditioning cream every 3–4 months, avoiding prolonged exposure to water and perspiration), can last between 3 and 6 years while developing a distinguished patina. Calfskin typically lasts 2–4 years, while shell cordovan is the most durable option due to its dense fibre structure.