Strap for Datejust 31 White Gold Diamond / Jubilee Diamond / Black Diamond

The lug width of the Rolex Datejust 31 reference 178159-0037 is 16mm. This measurement is taken with a digital calliper positioned between the two lugs of the case, and is essential for selecting a compatible strap that fits correctly without forcing the springbars.

For an 18-carat white gold case with a mother-of-pearl dial, an alligator strap in vegetable-tanned leather represents the most aesthetically coherent choice: the regular grain of the central scales complements the refined finishing of the Oyster case. Alternatively, smooth calf leather in tone-on-tone or bordeaux are refined options for formal and semi-formal settings.

To replace the strap on a Datejust 31, you will need a springbar tool to remove the springbars connecting the strap to the case lugs. Care should be taken to avoid scratching the white gold case: use a tool with a plastic or nylon tip, or entrust the operation to a watchmaker or the Casati Milano atelier for a professional replacement.

Yes, there are numerous quality aftermarket options for the Datejust 31 with a 16mm lug width. Milano Straps offers handcrafted straps in alligator, calf leather, shell cordovan and other materials, made with a 16mm attachment tailored to the curved lugs of the Datejust. Each strap is handmade and available with a buckle or deployant clasp.

The lifespan of a leather strap depends on the material and daily use. A quality vegetable-tanned alligator strap, with proper care (avoiding prolonged exposure to water and perspiration, applying conditioning cream periodically), can last between 3 and 7 years while maintaining a rich patina and structured profile. Milano Straps offers an 18-month guarantee against manufacturing defects on all atelier straps.