Strap for Datejust 31 Yellow Gold Domed / Oyster / Black

The Rolex Datejust 31 ref. 178248-0019 has a lug width of 16mm. This measurement, taken with a calliper between the two lugs of the 18kt yellow gold case, determines aftermarket strap compatibility. It is a non-standard size requiring straps specifically made for 16mm.

For the Datejust 31 in yellow gold, a vegetable-tanned alligator strap is the most coherent aesthetic choice: the scale grain complements the case texture and the natural patina that develops over time adds character to the piece. Shell cordovan is an equally refined alternative, offering a grain-free, dense surface with a deep, dry lustre suited to daily elegant wear.

To replace the strap on the Datejust 31, a spring bar tool is required to remove the spring bars securing the strap to the lugs. It is advisable to work on a soft surface to protect the yellow gold case from scratches. If in doubt, entrust the operation to a qualified watchmaker or the Casati Milano atelier.

Yes. milanostraps.it offers a curated selection of 16mm aftermarket straps compatible with the Datejust 31 178248-0019, handcrafted in alligator, calf leather, shell cordovan and rubber. The ends are tapered to fit the original case lugs without lateral play. A bespoke service is also available through Casati Milano for a fully made-to-measure strap.

The lifespan of a leather strap depends on material quality, daily usage and care. A high-quality vegetable-tanned alligator strap, used attentively and kept away from prolonged contact with water and perspiration, can last between 3 and 5 years while retaining a dignified patina. Casati Milano straps are covered by an 18-month warranty against manufacturing defects.