Rolex
Datejust 31 278289RBR-0023— lug 16mm

The lug width of the Rolex Datejust 31 278289RBR-0023 is 16 mm. This measurement is taken internally between the two lower case lugs and is specific to the Datejust 31 family, distinct from the 18 mm of the Datejust 36 and the 20 mm of the Datejust 41.

For an 18-carat white gold case with a diamond-set bezel, an alligator strap with vegetable tanning in midnight blue, bordeaux or pearl grey offers the highest formal coherence. Box-calf leather with a glossy finish is a discreet and equally elegant alternative. Both must have a 16 mm lug width for a precise fit.

To change the strap on a Rolex Datejust 31, the spring bars connecting the strap to the case lugs must be removed. Use a fine-tipped spring bar tool, applying leverage at the dedicated slot on the lug. Care is required to avoid scratching the white gold case: it is advisable to protect the lugs with low-tack adhesive tape before proceeding.

Yes. The Rolex Datejust 31 278289RBR-0023 takes straps with a 16 mm lug width, a standard size for which numerous artisan-made options exist. Milanostraps.it offers straps in alligator, calf leather, NATO and rubber manufactured specifically for 16 mm lugs, with keepers and buckles proportioned to the 31 mm case.

The lifespan of a leather strap depends on the material, care and daily use. A quality vegetable-tanned alligator strap, kept away from moisture and perspiration, can last between 3 and 7 years while retaining its shape and colour. Calf leather develops a patina more rapidly but requires conditioning cream every 3 to 4 months. Storing the watch on a stand when not worn significantly extends the strap's life.