Rolex
Datejust 31 278245-0036— lug 16mm

The Rolex Datejust 31 ref. 278245-0036 has a lug width of 16mm. This measurement is standard across the entire Datejust 31 range and should be verified with a digital calliper between the lugs at the point where they meet the case, ensuring an accurate strap replacement with no lateral play.

For the Datejust 31 in Everose gold, a polished alligator strap in bordeaux or cognac tones is the most coherent choice with the warmth of the metal. Shell cordovan with a natural patina and vegetable-tanned calf leather are excellent alternatives for everyday wear. A deployant clasp in rose gold completes the pairing with full metallic consistency.

The strap on the Datejust 31 is secured via 16mm spring bars inserted into the case lugs. A spring bar tool — either a forked or pointed tip version — is used to compress the spring bar ends until they release. No Rolex-specific tools are required, though care should be taken to avoid scratching the Everose gold case during the process.

Yes. The Datejust 31 ref. 278245-0036 accepts aftermarket straps with a 16mm lug width and standard spring bars. Milano Straps offers a curated selection of handcrafted leather, rubber and alternative material straps certified for this lug size, with a bespoke option available through the Casati Milano atelier for fully personalised commissions.

The lifespan of a leather strap depends on the quality of the hide, frequency of wear and exposure to moisture and perspiration. A high-quality alligator or shell cordovan strap, properly maintained and stored, can last between three and six years while developing a dignified patina. The 18-month production defect guarantee offered by Casati Milano does not cover natural wear.