Strap for Datejust 31 Stainless Steel Domed Diamond / Oyster / Meteorite

The Rolex Datejust 31 ref. 178344-0066 has a lug width of 16mm. This measurement refers to the internal distance between the two lugs at the point where the strap meets the case. This is a specific dimension of the Datejust 31 and is not compatible with the 20mm straps used on the Datejust 36 or 41.

For the Datejust 31 178344-0066 with its meteorite dial and Rolesor white case, an alligator belly strap is the most aesthetically coherent choice: the symmetrical grain complements the Widmanstätten pattern of the dial. Alternatively, shell cordovan develops a natural patina over time that enhances the uniqueness of each piece. Both options must be cut to a 16mm lug width.

To replace the strap on the Datejust 31, you must remove the spring bars from the lugs using a dedicated springbar tool with a fine tip. The 16mm spring bars must be the correct length for the Rolex case. It is advisable to work on a soft surface to avoid scratching the white Rolesor case. If in doubt, it is best to consult a watchmaker or the Casati Milano atelier.

Yes. The aftermarket offers 16mm straps in various materials compatible with the Datejust 31 178344-0066: alligator leather, calf leather, shell cordovan, NATO nylon, and vulcanised rubber. Milano Straps offers a selection of handcrafted 16mm straps made from high-quality materials with hand stitching, available with a steel buckle or deployant clasp.

The lifespan of a leather strap depends on the quality of the hide, the tanning process, and daily use. An alligator or shell cordovan strap with vegetable tanning, kept away from excessive water and perspiration and periodically treated with appropriate products, can last between 3 and 7 years whilst maintaining a refined appearance. The Milano Straps guarantee covers 18 months for manufacturing defects.