Rolex
Datejust 31 278241-0027— lug 16mm

The Rolex Datejust 31 ref. 278241-0027 features a lug width of 16mm. This measurement is taken with a digital calliper positioned between the two lugs at the base of the case. It is the key specification for selecting a compatible strap without requiring any adapters.

Given the fluted lunette in Everose gold, straps in vegetable-tanned alligator leather (burgundy, cognac or tobacco brown) offer the greatest aesthetic coherence. The grain of alligator leather does not compete with the texture of the fluted bezel and develops a distinctive patina over time. For more active use, vulcanised rubber is the most practical alternative.

Strap replacement requires a fine-tipped springbar tool to remove the springbars from the 16mm lugs. It is advisable to work on a soft surface to protect the dial and bezel. If in doubt, a watchmaker or the Casati Milano atelier can carry out the swap during a scheduled appointment.

Yes. Any strap with a 16mm lug width is technically compatible with the Datejust 31 278241-0027. Milano Straps offers a curated selection of handcrafted leather, rubber and fabric straps at 16mm, available both ready-to-ship and bespoke through the Casati Milano atelier.

The lifespan of a leather strap depends on the quality of the tanning, frequency of use and maintenance. A vegetable-tanned alligator strap, with regular conditioning (leather cream every 3–4 months and rotation with other straps), can last between 3 and 7 years while retaining its shape and patina. Smooth calfskin straps generally have a shorter lifespan of 1 to 3 years with daily wear.