Rolex
Datejust 31 178279-0047— lug 16mm

The Rolex Datejust 31 ref. 178279-0047 features a lug width of 16mm. This measurement refers to the internal distance between the two case lugs, where the strap is fitted. It is a non-standard size compared to more common 20mm references, so compatibility must be carefully verified before purchasing any aftermarket strap.

For a case in 18-carat white gold such as that of the Datejust 31 ref. 178279-0047, an alligator strap in vegetable-tanned leather represents the most coherent formal choice, thanks to the material contrast between the natural grain of the hide and the polished surfaces of the precious metal. Alternatively, high-quality calfskin with a French grain finish offers softness and versatility for everyday wear. For more sporting or summer contexts, precision vulcanised rubber is a functional and aesthetically sound option.

To replace the strap on the Rolex Datejust 31, a spring bar tool is required to remove the two spring bars from the case lugs. Care must be taken to avoid scratching the white gold surfaces: it is advisable to rest the watch on a soft cloth and work in good lighting. Alternatively, the watch may be taken to a watchmaker or entrusted to the installation service offered by Casati Milano.

Yes, high-quality aftermarket straps compatible with the 16mm lug width of the Datejust 31 ref. 178279-0047 are available. Milano Straps offers a dedicated selection of 16mm straps, handcrafted in Italy using selected materials such as alligator, calfskin and shell cordovan. These straps are made to measure to ensure a correct fit on the model's lugs, with no aesthetic or functional compromise.

The lifespan of a leather strap depends on the quality of the material, daily care and intensity of use. A first-quality alligator strap in vegetable-tanned leather or shell cordovan, regularly maintained with a specific nourishing cream, can last between 3 and 7 years while retaining a vibrant patina and sound structure. Prolonged contact with water, perspiration and perfume accelerates deterioration: immersion should be avoided and rotating between several straps is recommended to extend their useful life.