Strap for Datejust 31 Stainless Steel/ Rose Gold / Domed - Diamond / Rose - Roman / Oyster

The Rolex Datejust 31 ref. 278341rbr-0005 features a lug width of 16mm. This measurement is specific to the 31mm case size and differs from the more common 18mm or 20mm widths. Before purchasing an aftermarket strap, it is advisable to confirm the measurement using a digital calliper positioned between the inner faces of both lugs.

For the Datejust 31 278341rbr-0005 in Rolesor Everose with a diamond-set bezel, the most appropriate materials are polished alligator in burgundy or dark chocolate tones — which complement the warm reflections of the 18ct rose gold — and shell cordovan for those who prefer a more compact, dense texture. Vegetable-tanned calf leather in cognac or tobacco is an elegant option for everyday wear. A rose gold deployant clasp completes the aesthetic coherence of this reference.

Replacing the strap on the Datejust 31 requires a springbar tool (a forked screwdriver) to remove the spring bars securing the strap to the case lugs. Care must be taken to avoid scratching the Oystersteel and rose gold case. Alternatively, the procedure can be carried out by a watchmaker or, in the case of Casati Milano, directly at the atelier with a compatibility check for the chosen strap.

Yes. The Datejust 31 ref. 278341rbr-0005 accepts aftermarket straps with a 16mm lug width. Milano Straps offers a dedicated selection of 16mm straps in various materials — alligator, shell cordovan, vegetable-tanned calf leather and rubber — compatible with this reference. Each strap is crafted by hand and available with a choice of buckle or deployant clasp.

The lifespan of a leather strap depends on the material, frequency of use, and maintenance. A quality alligator strap, with regular use and proper care (avoiding prolonged contact with water, perspiration and chemicals), can last between 2 and 5 years. Shell cordovan, owing to its structural density, tends to last longer, developing a distinctive patina over time. The 18-month warranty against manufacturing defects offered by Casati Milano covers the craftsmanship quality of the strap.