Strap for Datejust 31 Yellow Gold / Diamond / Olive - Diamond / President

The lug width of the Rolex Datejust 31 reference 278288RBR-0007 is 16mm. This is a non-standard size within the Rolex catalogue and requires straps specifically manufactured for this attachment width. Before purchasing any aftermarket strap, it is advisable to verify the measurement using a calliper on the inner side of the lugs to account for any production tolerances.

For the Datejust 31 in yellow gold with a diamond-set bezel, an alligator belly strap with a polished finish on one or both edges is the most coherent choice with the watch's aesthetic register. Colours such as havana, cognac or midnight blue complement the yellow gold case without competing with the diamond bezel. Alternatively, a vegetable-tanned calfskin strap offers a more understated yet equally elegant everyday option.

To replace the strap on the Datejust 31, a dedicated springbar tool is required. The 1.8mm diameter springbars are released by applying gentle leverage within the inner lug slot. Care must be taken to avoid scratching the yellow gold case. If unfamiliar with this procedure, it is advisable to entrust the operation to a watchmaker or to the Casati Milano atelier, where strap fitting is included as part of the service.

Yes. Aftermarket straps with a 16mm lug width are compatible with the Datejust 31 278288RBR-0007. Milano Straps offers a curated selection of handcrafted leather, rubber and NATO textile straps in 16mm, designed to fit the original Rolex Oyster lugs without modification. It is essential to specify the 16mm size when ordering and to select springbars of appropriate diameter for the depth of the Oyster lugs.

The longevity of a leather strap depends on the hide, the tanning process and the conditions of use. A quality alligator strap with a calfskin lining and hand-stitched seams can last between two and five years with daily wear, provided it is kept away from prolonged exposure to water and perspiration. Shell cordovan straps tend to offer superior durability owing to the density of the fibre. Casati Milano provides an 18-month warranty against manufacturing defects on all bespoke straps.