Rolex
Datejust 31 278271-0017— lug 16mm

The lug width of the Rolex Datejust 31 ref. 278271-0017 is 16mm. This measurement must be taken with a calliper at the inner distance between the two lugs, as close to the case as possible. This is a specific dimension of the Datejust 31 and differs from the 20mm found on the Datejust 41 or Submariner models.

For the Datejust 31 in Everose Rolesor, a smooth alligator strap in bordeaux or cognac with an Everose gold buckle is the most coherent choice given the case materials. Vegetable-tanned calfskin is preferable for intensive daily wear, as it develops a natural patina over time. In both cases, the 16mm lug width must be observed precisely.

To replace the strap, use a spring bar tool or a flat-head screwdriver to release the spring bars securing the strap to the lugs. Work on a soft surface to protect the polished Everose gold case. If in doubt, a watchmaker or the Casati Milano atelier can perform the fitting without risk of scratching the polished surfaces.

Yes, there are many aftermarket straps compatible with the Rolex Datejust 31, provided they feature a 16mm lug width. Milanostraps.it offers a curated selection of 16mm straps in leather, rubber and nylon, specifically calibrated for this model. Casati Milano straps are handcrafted from selected materials and carry an 18-month guarantee against manufacturing defects.

The lifespan of a leather strap depends on the material, care and frequency of use. A quality alligator strap, kept away from excessive moisture and perspiration, maintains structural integrity for 3 to 5 years with regular use. Vegetable-tanned calfskin develops a patina but is more sensitive to water. Avoiding prolonged exposure to moisture and applying leather conditioner every 3 to 4 months will significantly extend the strap's life.