Strap for Datejust 31 Yellow Gold / Diamond / Grey - Roman / Oyster

The lug width of the Rolex Datejust 31 278288rbr-0025 is 16 millimetres. This dimension represents the internal space between the lugs where the strap is fitted. Accurate measurement is essential to ensure compatibility with aftermarket straps, as oversized straps will not fit properly whilst undersized straps will cause undesirable movement of the case.

For a yellow gold Datejust 31, alligator leather represents the premier choice, capable of enhancing the luminosity of the gold through its elegant and discrete grain pattern. Alternatively, vegetable-tanned calf in noble colours such as dark brown, bordeaux, or cognac naturally exalts the warm tonality of yellow gold. Shell cordovan constitutes a third option, featuring a natural patina that develops with use and superior flexibility.

Strap replacement requires specific tools: a spring bar tool or lever-action extractor and a stable work surface. Position the watch with the dial face downward, locate the lower lug access hole, insert the spring bar tool lever and apply gentle pressure to compress the internal spring, then extract the pin. Repeat the procedure on the opposite side. Reverse the process to install the new strap, ensuring the spring is correctly seated and the strap is straight before releasing pressure.

Yes, absolutely. The Datejust 31 with 16mm lug width is fully compatible with quality aftermarket straps, provided they are constructed specifically for this width. Selecting straps made from premium leathers such as alligator, vegetable-tanned calf, or shell cordovan ensures comfort, durability, and aesthetics consistent with the watch's prestige. Casati Milano offers bespoke custom straps manufactured in the Milan atelier with an 18-month warranty.

The lifespan of a leather strap depends on material quality, tanning process, and intensity of use. A quality artisanal alligator or vegetable-tanned calf strap typically lasts between 4 and 8 years of daily wear, developing a patina that enhances its character throughout this period. Shell cordovan tends to last longer, up to 10 years, owing to its superior fibrous structure. Constant exposure to perspiration, moisture, and UV rays accelerates ageing. Proper maintenance—regular drying and occasional conditioning—significantly prolongs strap life.