Rolex
Datejust 31 278271-0015— lug 16mm

The Rolex Datejust 31 ref. 278271-0015 has a lug width of 16mm. This measurement should be taken between the two case lugs using a vernier calliper. It is a specific dimension, less common than 18mm or 20mm, and requires straps manufactured to precise millimetric tolerance for correct fitting.

For the Datejust 31 in Rolesor Everose, an alligator strap with vegetable tanning in bordeaux or honey brown tones best complements the warmth of the Everose gold. For everyday wear, box-calf leather is a sound alternative that develops an attractive patina over time. For sport or summer use, vulcanised rubber provides full water resistance and comfort. The ideal choice depends on context and personal taste.

To change the strap on the Datejust 31, the strap bars must be removed from the case lugs using a dedicated spring bar tool or lug width lever tool. Rolex spring bars typically have a diameter of approximately 1.5mm. It is advisable to work on a soft pad to protect the case and crystal, and to have the operation carried out by a watchmaker or specialist atelier to avoid scratching.

Yes, high-quality aftermarket straps compatible with the Rolex Datejust 31 are available, provided they have a lug width of 16mm and spring bars of the correct diameter. Milano Straps and Casati Milano atelier produce bespoke straps specifically for this reference, in leather, rubber or nylon, with finishes and materials selected to match the standard of the watch.

The lifespan of a leather strap depends on the material, craftsmanship and usage. A quality vegetable-tanned alligator strap, properly cared for and kept away from excessive moisture and perspiration, can last between 3 and 5 years while retaining a distinguished appearance. Calf leather tends to show wear more readily but develops a characterful patina. Casati Milano offers an 18-month guarantee against manufacturing defects.