Strap for Datejust 31 Stainless Steel / Yellow Gold / Domed / MOP / Jubilee

The lug width of the Rolex Datejust 31 ref. 278243-0028 is 16mm. This measurement refers to the internal distance between the two lugs of the case, where the strap attaches. It is a specific value for this 31mm line and is not interchangeable with lug widths found on other Datejust models of different diameters.

For the Datejust 31 278243-0028 with its mother-of-pearl dial and yellow Rolesor construction, an alligator strap in vegetable-tanned leather is the most coherent choice both aesthetically and materially. The block-scale texture complements the iridescent luminosity of the mother-of-pearl. Alternatively, smooth box-calf leather offers everyday versatility, whilst shell cordovan in cognac tones enhances the yellow gold components.

The strap on the Datejust 31 is removed using a spring bar tool to release the spring bars securing the strap to the lugs. Care must be taken not to scratch the yellow gold lugs: it is advisable to use a tool with a nylon tip or to protect the lugs with soft adhesive tape. The new 16mm strap is fitted by compressing the spring bars until they click into their seats in the lugs.

Yes, high-quality aftermarket straps compatible with the Datejust 31 278243-0028 are available. It is essential that the lug width is exactly 16mm, with a tolerance no greater than ±0.2mm to ensure a precise fit. Milano Straps produces handcrafted leather and technical-material straps specifically calibrated for Rolex 16mm lugs, available online or as bespoke commissions through the Casati Milano atelier.

The lifespan of a leather strap depends on the material, care and frequency of use. A quality alligator strap in vegetable-tanned leather, with periodic conditioning and rotation with other straps, can last between 3 and 7 years whilst retaining a dignified appearance. Calf leather tends to develop patina more quickly, with an average lifespan of 2 to 4 years. Avoiding prolonged contact with water and perspiration significantly extends the life of the strap.