Strap for Datejust 31 Stainless Steel / Yellow Gold / Diamond / Olive - Diamond / Jubilee

The Rolex Datejust 31 ref. 278383rbr-0030 has a lug width of 16mm. This measurement is taken between the lower lugs of the case using a millimetre calliper. It should not be confused with the 18mm or 20mm lug widths found on other Datejust variants. Any aftermarket strap must explicitly state compatibility with a 16mm lug attachment.

For the Datejust 31 in yellow Rolesor, alligator straps with vegetable tanning in cognac or dark chocolate tones complement the bimetallic case most effectively. Box calf leather is ideal for daily wear, developing a characteristic patina over time. For sporting or aquatic contexts, vulcanised rubber offers durability and water resistance. A deployant clasp is recommended to preserve the shape of leather straps.

To replace the strap on the Datejust 31, use a thin-blade screwdriver or a dedicated springbar tool to compress the springbar within the 16mm lug. Once compressed, slide the strap free and insert the new one, ensuring the springbars are correctly seated in both lug holes. It is advisable to work on a soft cushion or watchmaker's mat to avoid scratching the case.

Yes. Any strap with a 16mm lug width and a profile compatible with the Oyster lug is suitable for the Datejust 31. Milano Straps offers a curated selection of handcrafted 16mm straps in alligator, calf leather, shell cordovan and technical materials, with bespoke customisation available through the Casati Milano atelier.

The longevity of a leather strap depends on the material, maintenance and frequency of wear. A quality alligator strap with vegetable tanning, properly cared for and rotated with a second strap, can last between three and seven years while retaining structural integrity and patina. Smooth calf leather typically lasts two to four years but develops a distinctive character over time. Moisture, perspiration and direct sunlight are the primary factors accelerating wear.