Rolex
Datejust 31 178279-0072— lug 16mm

The Rolex Datejust 31 reference 178279-0072 features a 31mm case with a lug width of 16mm. This is a specific measurement that requires straps made precisely for this dimension, not interchangeable with the more common 18mm or 20mm widths.

For a 31mm white gold case, vegetable-tanned alligator with a transversal grain pattern is the most coherent choice given the watch's positioning. Smooth calf leather is the most versatile option for daily wear, while shell cordovan offers superior durability and develops a particularly sought-after patina over time. The correct width is 16mm.

To replace the strap on the Datejust 31, you will need a spring bar tool with a fine tip, inserted into the side slot of the lugs to release the spring bars. It is advisable to work on a soft surface to protect the white gold case from scratches. Alternatively, the installation service is available at Atelier Casati Milano by appointment.

Yes. milanostraps.it offers a curated selection of aftermarket straps produced specifically for the 16mm lug width, compatible with the Datejust 31. Available in alligator, calf leather, shell cordovan and rubber, with or without a deployant clasp. All models are handcrafted and verified for dimensional compatibility with the Datejust 31 lugs.

The lifespan of a leather strap depends on the material, the tanning method and daily use. A quality vegetable-tanned alligator strap, with proper rotation and storage, can last between 3 and 7 years. Shell cordovan is the most durable material available. Casati Milano straps are covered by an 18-month warranty against manufacturing defects.