Strap for Datejust 31 Stainless Steel Fluted / Jubilee / Aubergine - Roman

The lug width of the Rolex Datejust 31 reference 278274-0026 is 16mm. This measurement is taken between the inner faces of the two lugs, at the point where the strap connects to the case. A digital calliper is the most reliable tool for verifying this dimension before purchasing an aftermarket strap.

For the 278274-0026 in Oystersteel and white gold, a vegetable-tanned alligator strap is the most coherent choice given the dress character of the piece. Shell cordovan offers a compact, luminous surface with a distinctive patina over time. Both materials are available in 16mm, either ready-made online or bespoke through Casati Milano atelier.

The strap on the Datejust 31 is secured via standard spring bars within the 16mm lugs. Removal requires a fine-tipped spring bar tool to release the bars without scratching the case. It is advisable to work on a soft surface and, if in doubt, to entrust the operation to a watchmaker or specialist atelier to avoid any damage to the lugs.

Yes, high-quality artisan aftermarket straps are produced specifically for the 16mm lug width of the Datejust 31. Milano Straps offers a curated selection in alligator, calfskin, and shell cordovan, with buckle or deployant clasp options, available for immediate online purchase or bespoke production through Casati Milano.

The lifespan of a leather strap depends on tanning quality, frequency of use, and maintenance. A high-quality vegetable-tanned alligator or shell cordovan strap, under regular but non-sporting use, will retain its structural and aesthetic integrity for 3 to 5 years. Prolonged exposure to water, perspiration, and perfume should be avoided to maximise longevity.