Rolex
Datejust 31 278275-0026— lug 16mm

The Rolex Datejust 31 ref. 278275-0026 has a lug width of 16mm. This measurement should be taken using a digital calliper positioned internally between the two lugs, flush against the case, to ensure a correct tolerance of ±0.2mm when selecting an aftermarket strap.

For the Datejust 31 in Everose gold, a vegetable-tanned alligator belly strap in bordeaux, cognac or taupe tones is the most coherent choice with the watch's formal register. Shell cordovan is a premium alternative for those seeking a dense, polished surface. For everyday wear, box-grain calfskin offers excellent durability and develops a distinguished patina over time.

Strap replacement on the Datejust 31 is carried out using standard 16mm springbars. It is advisable to use a fine-tipped springbar tool to avoid scratching the Everose gold lugs. The operation requires care, as the precious metal lugs are susceptible to surface abrasion. Alternatively, the operation can be entrusted to a watchmaker or to Casati Milano atelier for a risk-free replacement.

Yes, numerous aftermarket straps are compatible with the Datejust 31, provided they conform to the 16mm lug width. Milano Straps offers a curated selection of handcrafted leather, rubber and nylon straps specifically built for this dimension, with a bespoke option through Casati Milano atelier for custom finishes and personalised fittings.

The lifespan of a leather strap depends on the material and usage conditions. A quality vegetable-tanned alligator strap, used with care and rotated regularly, can last between three and seven years while maintaining structural integrity. Shell cordovan offers superior longevity due to the density of its fibres. Prolonged contact with water and perspiration should be avoided, and a leather conditioner applied periodically. Casati Milano straps carry an 18-month guarantee against manufacturing defects.