Rolex
Datejust 31 278275-0033— lug 16mm

The lug width of the Rolex Datejust 31 reference 278275-0033 is 16mm. This is a fixed construction dimension determined by the geometry of the 31mm Everose gold case. All aftermarket straps must respect this measurement at the upper terminal.

For the Datejust 31 278275-0033 in Everose gold, the most aesthetically coherent options are vegetable-tanned alligator in cognac or bordeaux tones and smooth box-calf leather. Both materials complement the polished texture of Everose gold. For more active use, vulcanised rubber is the most technically appropriate choice.

To replace the strap on a Datejust 31, the spring bars must be removed using a dedicated spring bar tool or lever. The Datejust spring bars compress laterally to release. It is advisable to work on a soft surface to protect the Everose gold lugs from scratches. If in doubt, Casati Milano offers a professional strap fitting service at the atelier.

Yes. Aftermarket straps compatible with the Datejust 31 must measure 16mm at the upper terminal. It is important to verify the terminal curvature: the Datejust 31 lugs have a specific profile that requires a slightly curved end piece. Milano Straps offers handcrafted 16mm straps tested for compatibility with this reference.

The lifespan of a leather strap depends on leather quality, tanning method and daily use. A high-quality vegetable-tanned alligator strap can last between 3 and 7 years with regular care, avoiding prolonged exposure to water and perspiration. Box-calf leather offers a similar lifespan, with the added benefit of developing a distinctive patina over time. Milano Straps provides an 18-month guarantee on manufacturing defects.