Strap for Datejust 31 Rolesor Yellow Diamond / Jubilee / Green Roman

The Rolex Datejust 31 ref. 178383-0005 has a lug width of 16mm. This measurement should be verified using a digital calliper placed between the two lugs at the strap attachment point. Fitting a strap even 1mm wider or narrower will compromise both the installation and the overall aesthetic of the watch.

For the Datejust 31 in yellow gold Rolesor, a vegetable-tanned alligator strap in cognac, bordeaux or black represents the most coherent choice from both a craft and aesthetic standpoint. Smooth calf leather is the most versatile option for daily wear. For sporting contexts, a vulcanised rubber strap with a shaped end piece ensures correct fit and proportions. All options must feature a 16mm lug width.

To remove the original strap from the Datejust 31, a flat-head screwdriver or a spring bar tool is required. The 16mm spring bars are released by pressing on their ends inside the lugs. It is advisable to work on a soft surface to avoid scratching the case, and to replace the spring bars with high-quality steel versions appropriate to the weight and tension of the chosen strap.

Yes. Several artisan manufacturers, including Casati Milano for milanostraps.it, produce aftermarket straps specifically designed for the Datejust 31 with a 16mm lug width. Quality models feature curved or straight end pieces compatible with the Rolex lug profile, hand-stitched finishing and carefully selected leathers. It is important to ensure that the strap end piece has the correct curvature to fit the case shape without forcing.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily use. A first-quality vegetable-tanned alligator strap, with regular care (avoiding prolonged exposure to water and perspiration, applying leather conditioner every 3–4 months), can last between 3 and 6 years while retaining a well-kept appearance. Cordovan tends to last longer, developing a characteristic patina over time. Lower-quality leather straps may deteriorate within 12–18 months. The Casati Milano warranty covers 18 months against manufacturing defects.