Strap for Datejust 31 Stainless Steel Diamond / Oyster / MOP - Roman

The Rolex Datejust 31 ref. 178384-0022 has a lug width of 16mm. This measurement is taken with a digital calliper between the two lugs at the point where the strap attaches to the case, and is consistent across the entire Rolex Datejust 31mm range.

For a Datejust 31 with a mother-of-pearl dial, a vegetable-tanned alligator strap is the most fitting choice: the natural belly grain complements the iridescent reflections of the dial. Shell cordovan offers a more understated alternative, developing a patina that improves with wear. Both pair well at 16mm with a deployant clasp in white gold or brushed steel.

The strap on the Datejust 31 is secured to the lugs via 16mm spring bars. Replacement requires a spring bar tool or forked lever: compress the spring bar, remove the existing strap, and fit the new one. This is a straightforward operation that can be carried out by any watchmaker or carefully by the owner.

Yes. Any strap with a 16mm lug width is technically compatible with the Datejust 31. Quality handcrafted aftermarket straps, such as those made by Casati Milano in alligator or calf leather, offer materials and finishing comparable to original Rolex straps, with the added benefit of full customisation in colour, texture, and clasp type.

The lifespan of a leather strap depends on the quality of the hide and how it is maintained. A high-quality alligator or shell cordovan strap, treated with appropriate conditioners and rotated regularly, can last between three and seven years while retaining its aesthetic integrity. Vegetable tanning offers greater resistance to deformation over time compared to chrome tanning. Prolonged exposure to water, perspiration, and UV radiation accelerates deterioration.