Strap for Datejust 31 Stainless Steel Domed Diamond / Jubilee / Pink - Roman

The Rolex Datejust 31 reference 278344rbr-0026 has a lug width of 16mm. This measurement should be taken with a digital calliper at the narrowest point between the two lugs, where the strap inserts into the case. This is a non-standard size compared to the 20mm of the Datejust 41, so straps must be specifically made for 16mm attachments.

For a two-tone white gold and steel case with a diamond-set bezel, a polished alligator strap is the most coherent choice for formal and evening occasions. Vegetable-tanned calf leather is preferable for daily wear, thanks to the patina it develops over time. In both cases, a deployant clasp in steel or white gold is recommended to preserve the strap's geometry and the visual symmetry of the wrist.

Strap replacement requires a fine-tipped springbar tool to remove the spring bars from the lugs. The Datejust 31's lugs are polished and relatively narrow: care should be taken to avoid scratching the case. Alternatively, the operation can be carried out by a watchmaker or directly at the Casati Milano atelier during the strap customisation session.

Yes, high-quality aftermarket straps compatible with the 16mm lug width of the Datejust 31 278344rbr-0026 are available. It is essential that the strap ends are shaped or slightly curved to follow the profile of the Rolex case. Milano Straps offers a selection of handcrafted leather, rubber and technical material straps specifically finished for this lug width.

The lifespan of a leather strap depends on the material, frequency of use and care. A high-quality alligator strap, used in rotation and protected from moisture, can last between 3 and 5 years while maintaining its structural integrity. Vegetable-tanned calf leather develops an appreciable patina but is more sensitive to water. Milano Straps offers an 18-month guarantee against manufacturing defects on all straps made by the Casati Milano atelier.