Strap for Datejust 31 Stainless Steel Diamond / Jubilee / MOP

The Rolex Datejust 31 ref. 278384rbr-0008 has a lug width of 16mm. This is a non-standard size compared to more common references: it is essential to measure it accurately with a digital calliper, taking the internal distance between the two lugs, before purchasing any aftermarket strap.

For the Datejust 31 278384rbr-0008 with its mother-of-pearl dial and white Rolesor case, the most suitable straps are in vegetable-tanned alligator in ivory, greige or pearl grey tones, or in shell cordovan in burgundy or navy for a refined contrast. High-quality smooth calf leather is the most versatile choice for everyday wear.

To replace the strap on the Datejust 31, a fine-tipped springbar tool is required to remove the spring bars from the lugs. The operation must be carried out carefully to avoid scratching the white Rolesor case. It is advisable to work on a soft surface and, if in doubt, to entrust the task to a watchmaker or the Casati Milano atelier.

Yes, high-quality artisan aftermarket straps compatible with the 16mm lug width of the Datejust 31 are available. At milanostraps.it you can find a curated selection of 16mm straps in various materials — leather, alligator, rubber — crafted to fit the original lugs precisely without any modification to the case.

The lifespan of a leather strap depends on the material, care and frequency of use. A quality vegetable-tanned alligator strap, kept away from moisture and cosmetics, can last between 3 and 5 years while developing an elegant patina. Shell cordovan is generally more resistant to daily wear. The Casati Milano guarantee covers manufacturing defects for 18 months.