Rolex
Datejust 31 278341rbr-0003— lug 16mm

The Rolex Datejust 31 reference 278341rbr-0003 has a lug width of 16mm. This measurement is taken with a calliper between the two lower lugs of the Oyster case and is specific to this 31mm family, distinct from the 20mm found on men's Rolex references.

For the Datejust 31 in Rolesor rose, an alligator strap with a rectangular grain pattern is the most coherent choice given the formal character of this reference. As an alternative, vegetable-tanned calf leather develops an authentic patina over time, whilst technical nylon NATO straps offer versatility for casual wear. A deployant clasp in rose gold or steel enhances any formal pairing.

Strap replacement on the Datejust 31 is carried out via the spring bars connecting the strap to the case lugs. A forked spring bar tool is required to compress the bars and remove the strap without scratching the Everose or Oystersteel surfaces. It is advisable to entrust this operation to a watchmaker or a specialist atelier.

Yes, artisan aftermarket straps compatible with the 16mm lug width are available for the Datejust 31. It is essential to verify that the strap ends suit the Oyster case profile and that the spring bars are of the correct diameter. Milano Straps offers bespoke 16mm straps compatible with this reference.

The lifespan of a leather strap on a Datejust 31 depends on the material and frequency of wear. A high-quality alligator strap, worn daily, typically lasts 2–4 years before replacement is required. Vegetable-tanned calf leather develops character over time and can last over 3 years if kept away from water. Shell cordovan is among the most resistant materials to mechanical wear.