Strap for Datejust 31 Rolesor Fluted Diamond / Jubilee / Champagne Computer

The lug width of the Rolex Datejust 31 178313-0030 is 16mm. This measurement must be taken internally between the case lugs, at the point where the strap meets the case, using a millimetre calliper. This is a specific dimension that differs from larger Datejust references.

For the two-tone Rolesor case of the Datejust 31 178313-0030, alligator leather straps are the most formally coherent choice. A cognac or tobacco alligator strap enhances the yellow gold components, whilst navy blue or black provides a balanced contrast to the bi-metal case. Shell cordovan is a characterful alternative for those who appreciate a natural patina developing over time.

The strap on a Rolex Datejust 31 is removed by applying gentle pressure with a dedicated springbar tool to the springbars housed within the case lugs. A proper tool is strongly recommended to avoid scratching the polished surfaces. Any replacement strap must have an exact 16mm attachment width.

Yes, a wide range of aftermarket straps are compatible with the Rolex Datejust 31 178313-0030, provided they feature a 16mm lug width. Milano Straps and the Casati Milano atelier produce handcrafted straps in alligator, calf leather, shell cordovan, and vegetable-tanned leather specifically for this lug size, with buckles and deployant clasps proportioned to the 31mm case.

The lifespan of a leather strap depends on the material and care taken: a high-quality alligator strap, kept away from water and excessive perspiration and treated with appropriate products, can last between three and seven years with daily wear. Shell cordovan tends to develop a patina and last longer due to the density of its fibres. Milano Straps provides an 18-month guarantee against manufacturing defects.