Rolex
Datejust 31 278341rbr-0029— lug 16mm

The Rolex Datejust 31 ref. 278341rbr-0029 has a lug width of 16 mm. This dimension is fixed by the geometry of the 31 mm Oyster case: any compatible strap or bracelet must have a straight end measuring 16 mm to fit correctly between the lugs.

For the Datejust 31 in Everose Rolesor with a diamond-set bezel, a vegetable-tanned alligator strap is the most refined choice: the scale texture complements the brilliance of the diamonds without competing with them. Alternatively, box-grain calf leather develops a natural patina over time that harmonises with the warm tones of the Everose gold. For sports or summer use, vulcanised rubber offers full water resistance.

To replace the strap on the Datejust 31, a dedicated springbar tool is required to remove the spring bars securing the strap to the lugs. Care must be taken not to scratch the Everose Rolesor case: it is advisable to protect the surfaces with soft tape or to entrust the operation to a watchmaker or the Casati Milano atelier for a professional fitting.

Yes. Any aftermarket strap with a 16 mm straight end attachment is compatible with the Datejust 31 ref. 278341rbr-0029. On milanostraps.it, a dedicated selection of 16 mm straps is available in various materials — alligator, calf, shell cordovan, NATO and rubber — all sized for this case.

The lifespan of a leather strap depends on the material, frequency of use and maintenance. A high-quality vegetable-tanned alligator strap, kept away from prolonged moisture and treated periodically with appropriate products, can last between 3 and 7 years while retaining a fine patina. Calf leather typically lasts 2 to 4 years. Casati Milano provides an 18-month guarantee against manufacturing defects on all its straps.