Strap for Datejust 31 Rolesor Everose Domed Diamond / Jubilee / White Roman

The Rolex Datejust 31 ref. 178341-0001 has a lug width of 16mm. This measurement is standard across the Datejust 31 family and should be taken with a digital calliper between the two lugs, at the point where the strap attaches to the case horn. When selecting an aftermarket strap, a tolerance of ±0.2mm must be respected to ensure a precise fit without lateral play.

For the Datejust 31 in Rolesor Everose, a vegetable-tanned alligator leather strap is the most coherent choice for the watch's elegant register. Shades of bordeaux, cognac or midnight blue complement the rose gold case effectively. Shell cordovan is a high-craft alternative that develops a distinctive patina over time. For sportier use, vulcanised rubber ensures water resistance and longevity. Casati Milano crafts both options to order, with a terminal shaped to fit the 16mm Rolex lugs precisely.

To replace the strap, use a fine-tipped spring bar tool inserted into the lateral notch of the lug, between the case horn and the spring bar. Apply gentle inward pressure to compress the bar and release the strap. It is advisable to work on a soft surface to protect the caseback and bezel from scratches. Alternatively, a watchmaker or the Casati Milano atelier can perform the swap in a matter of minutes without risk of damage.

Yes, a number of artisan manufacturers produce aftermarket straps with a 16mm attachment compatible with the Datejust 31. The key criterion is terminal precision: the strap end must follow the curvature of the Rolex lug without forcing. Casati Milano produces bespoke straps with a terminal shaped to the exact dimensions of the 178341-0001 lugs, available in leather, cordovan and rubber. Ready-to-ship options are also available online in the 16mm strap section of milanostraps.it.

The lifespan of a leather strap depends on the material, the quality of the tanning process and daily wear conditions. A high-quality vegetable-tanned alligator strap, maintained with regular conditioning (every 2–3 months) and protected from excessive moisture, can retain its structural and aesthetic integrity for 3–6 years. Shell cordovan, owing to the dense fibrous structure of the equine muscle tissue, can last well beyond 7–10 years and develops a distinguished patina. Casati Milano straps carry an 18-month warranty against manufacturing defects.