Strap for Datejust 31 Rolesor Yellow Domed / Jubilee / Black Diamond

The Rolex Datejust 31 178243-0045 has a lug width of 16mm. This measurement is taken between the two lugs on the case side and represents the strap attachment width. It is specific to this 31mm diameter and is not interchangeable with the 18mm or 20mm straps used on other Datejust references.

For the Datejust 31 178243-0045 in yellow Rolesor, alligator straps with mississippiensis or caiman grain complement the texture of the fluted bezel. Vegetable-tanned calfskin is ideal for those who appreciate a natural patina developing over time. Shell cordovan offers understated luxury with its compact, burnished surface. In all cases, a buckle or deployant clasp in yellow gold or gold-tone PVD maintains visual coherence with the case.

To replace the strap on a Rolex Datejust 31, a fine-tipped spring bar tool or screwdriver is required to remove the spring bars housed in the lugs. The original Rolex spring bars have a specific diameter; it is advisable to replace them with equivalent quality bars, preferably solid steel. Care must be taken to avoid scratching the case. If in doubt, it is best to consult a watchmaker or the Casati Milano atelier.

Yes. Many artisan manufacturers produce aftermarket straps with a 16mm attachment compatible with the Datejust 31. milanostraps.it offers a selection of leather, alligator, calfskin and rubber straps specifically designed for 16mm lugs, with keepers and buckles in the most common finishes (steel, gold, PVD). Compatibility depends exclusively on the lug width and the geometry of the strap ends.

The lifespan of a leather strap depends on the material, frequency of use and exposure to perspiration and moisture. A quality alligator strap, with moderate daily use, maintains structural and aesthetic integrity for 2–4 years. Vegetable-tanned calfskin develops a patina over time but may require earlier replacement if frequently exposed to water. Shell cordovan, thanks to the compactness of its fibres, tends to have the greatest longevity among commonly used leathers. The Casati Milano guarantee covers manufacturing defects for 18 months.