Rolex
Datejust 31 278384rbr-0023— lug 16mm

The Rolex Datejust 31 ref. 278384rbr-0023 has a lug width of 16mm. This measurement should always be verified directly between the two case lugs with a calliper before purchasing an aftermarket strap, as even a 1mm discrepancy results in unacceptable lateral play.

Given the jewellery-oriented nature of this white gold and diamond-set model, an alligator leather strap with vegetable tanning is the most coherent choice. Shell cordovan is a valid alternative for those preferring a denser, more understated surface. In sportier contexts, a shaped vulcanised rubber strap offers both water resistance and wearing comfort.

The strap is secured to the lugs via 16mm spring bars. Removal requires a spring bar tool inserted into the lateral slot of each lug. It is advisable to rest the case on a soft cloth to avoid scratching the polished white gold surfaces during the operation.

Yes. The aftermarket offers a wide range of 16mm straps in leather, alligator, rubber and NATO fabric, all compatible with the Datejust 31 lugs. Milano Straps curates a selection of handcrafted 16mm straps, including bespoke options through the Casati Milano atelier, ensuring materials and finishing consistent with the original timepiece.

The lifespan of a leather strap depends on the quality of the hide, maintenance and daily use. A high-grade alligator or shell cordovan strap, kept away from prolonged water and perspiration exposure, can last between 3 and 7 years while developing a distinguished patina. Using a deployant clasp significantly reduces mechanical stress on the stitching, extending the strap's service life.