Rolex
Datejust 31 278285rbr-0019— lug 16mm

The Rolex Datejust 31 ref. 278285rbr-0019 features a lug width of 16mm. This measurement is specific to this model and must be adhered to precisely when selecting an aftermarket strap. An incorrect measurement will result in an incompatible strap that cannot be fitted to the case lugs.

The ideal choice depends on intended use. For formal elegance, an alligator with vegetable tanning or shell cordovan represent the highest standard, offering natural grain and exceptional durability. For daily versatility, vintage-patina calf leather provides comfort and develops unique texture over time. Black calf with a rose gold deployant clasp combines practicality with formal sophistication.

The procedure requires a spring bar tool with a flat blade to access the lug holes. Position the blade in the slot beneath the lug, gently lift the retaining pin, and remove the existing strap. Reverse the process to install the new strap. Exercise caution to avoid scratching the rose gold case. Casati Milano offers complimentary strap changes for customers purchasing from our atelier.

Yes, provided the lug width measures precisely 16mm and the construction quality aligns with the timepiece's value. A bespoke strap from Casati Milano adds distinctive character to the Datejust 31 and enables colour and material combinations impossible with the original bracelet, fully exploiting the watch's versatility.

A high-quality strap constructed from full-grain leather—alligator, shell cordovan, or vegetable-tanned calf—typically lasts 3–5 years under daily wear, depending on moisture exposure and mechanical stress. With proper care (rapid drying after rain, avoiding prolonged perspiration), durability extends comfortably beyond five years. A custom Casati Milano strap includes an 18-month warranty against manufacturing defects.