Rolex
Datejust 31 178384-0058— lug 16mm

The Rolex Datejust 31 ref. 178384-0058 has a lug width of 16mm. This measurement is specific to the 31mm case size and differs from the Datejust 36 or 41, both of which use 20mm straps. Before purchasing an aftermarket strap, it is advisable to verify the measurement using a digital calliper placed between the inner faces of the lugs.

For the stainless steel and white gold variant, a vegetable-tanned alligator strap is the most coherent choice given the watch's formal register. The belly grain complements the Jubilee or President bracelet texture. Shell cordovan develops a distinguished patina over time. For everyday wear, treated vegetable-tanned calf leather combines durability with material refinement. A deployant clasp in steel or white gold is strongly recommended to reduce strap flexion and extend its lifespan.

To replace the strap on a Datejust 31, the spring bars connecting the bracelet or strap to the case lugs must be removed. A spring bar tool is inserted into the notch on the side of the spring bar to compress and release it from the lug. Care should be taken not to scratch the case: protective tape over the lugs is advised during the procedure.

Yes. Aftermarket straps compatible with the Datejust 31 must have a lug width of 16mm and standard spring bars of 1.5mm diameter. milanostraps.it offers a selection of artisan straps in 16mm in various materials — alligator, calf, cordovan, NATO — crafted to this specific measurement. For a perfect fit and bespoke craftsmanship, the Casati Milano made-to-order service is also available by appointment.

The lifespan of a leather strap depends on the material, maintenance, and frequency of use. A quality alligator strap, properly cared for and rotated with other straps, can last between 3 and 5 years or more. Shell cordovan, due to its dense fibre structure, typically outlasts most other leathers. It is advisable to avoid prolonged exposure to perspiration and water, to apply a leather conditioner periodically, and not to over-tighten the buckle in order to preserve the strap's integrity.