Strap for Datejust 31 Rolesor Yellow Diamond / Jubilee / Champagne

The Rolex Datejust 31 ref. 178383-0027 has a lug width of 16mm. This measurement is taken between the two lower lugs using a digital calliper. It is a specific value that requires straps made for a 16mm lug width, distinct from the more common 18mm or 20mm sizes.

For the Datejust 31 in yellow Rolesor, the most suitable materials are matte black or midnight blue alligator for formal occasions, and vegetable-tanned calf leather in cognac or tobacco for everyday wear. Both options complement the 31mm proportions and work naturally with the yellow gold without appearing excessive. A deployant clasp in polished steel or gold PVD completes the pairing with functional elegance.

To replace the strap on the Datejust 31, a spring bar tool with a dual-tip lever is required to remove the spring bars securing the strap to the lugs. Care must be taken to avoid scratching the 18ct yellow gold lugs. Alternatively, any watchmaker or the Casati Milano atelier can carry out the swap in a matter of minutes during a bespoke strap fitting session.

Yes. Aftermarket straps with a 16mm lug width are compatible with the Datejust 31 ref. 178383-0027. Milano Straps offers a curated selection in alligator, calf leather, shell cordovan and rubber, all available in this specific size. It is advisable to choose straps with a curved or flexible tail end to accommodate the internal curvature of this model's lugs.

The lifespan of a leather strap on a Datejust 31 depends on the quality of the hide, frequency of wear and daily care. A high-grade alligator or shell cordovan strap, worn on rotation and kept away from water and perspiration, can last between 3 and 7 years while developing a distinguished patina. Vegetable-tanned calf leather typically lasts 2 to 4 years with regular use. Storing the strap in a closed watch roll significantly extends the leather's service life.