Rolex
Datejust 31 178341-0058— lug 16mm

The Rolex Datejust 31 ref. 178341-0058 has a lug width of 16mm, measured internally between the two lugs using a digital calliper. It is essential to source straps with curved ends to ensure a flush fit against the Oyster case profile.

For the Datejust 31 in Everose gold and stainless steel, a vegetable-tanned alligator strap is the most coherent choice for formal wear, as the natural grain complements the polished steel bracelet links. For everyday durability, Box Calf leather or shell cordovan are high-quality alternatives. The strap must feature a 16mm curved-end attachment.

Removing the original strap or bracelet from the Datejust 31 requires a springbar tool inserted between the lug and the strap to compress the spring bars. Care should be taken to protect the case surfaces with soft adhesive tape, or the operation can be entrusted to a watchmaker. Standard 16mm spring bars are compatible with most aftermarket straps.

Yes. Several artisan manufacturers produce straps compatible with a 16mm curved-end attachment for the Datejust 31 Oyster case. Milanostraps.it offers a curated selection of 16mm straps in alligator, calf leather, shell cordovan and rubber, available bespoke or ready to ship, fitted with a steel buckle or deployant clasp.

The lifespan of a leather strap depends on the quality of the tanning process and daily use. A high-quality vegetable-tanned alligator strap, properly maintained, can last between three and five years. Box Calf leather offers a similar lifespan but requires careful protection from moisture. Using a deployant clasp significantly reduces mechanical stress on the leather, extending the strap's service life.