Strap for Datejust 31 Stainless Steel Domed Diamond / Oyster / Silver - Diamond

The Rolex Datejust 31 ref. 278344RBR-0031 features a lug width of 16mm. This is a non-standard size compared to the more common 18mm or 20mm formats, so it is essential to select aftermarket straps specifically manufactured for this measurement, ideally with pre-curved ends to match the integrated lug curvature of Rolex cases.

For the Datejust 31 in white gold and steel, a vegetable-tanned alligator strap with Louisiana or hornback grain is the most technically coherent choice for this timepiece's character. Box calf leather offers a more formal alternative, while fine-grain vulcanised rubber suits intensive daily wear. A deployante clasp in steel or white gold enhances visual symmetry with the case.

To replace the strap on the Datejust 31, use a spring bar tool with a fine or lever tip to release the 16mm spring bars from the lugs. Work on a soft cushion to protect the Oystersteel case and diamond-set bezel. If in doubt, it is advisable to entrust the operation to a watchmaker or to the Casati Milano atelier, where strap fitting is included in the bespoke service.

Yes, quality aftermarket straps are available specifically made for 16mm lugs compatible with the Datejust 31. It is essential to choose manufacturers who respect Rolex lug tolerances and use stainless steel spring bars. Milano Straps offers a curated selection of 16mm leather, rubber, and NATO straps compatible with this reference.

The lifespan of a leather strap depends on leather quality, frequency of use, and exposure to moisture and perspiration. A high-grade vegetable-tanned alligator strap, with regular use and proper care, typically lasts between 2 and 4 years before requiring replacement. Shell cordovan tends to last longer due to its dense fibre structure. Milano Straps provides an 18-month warranty against manufacturing defects on all Casati Milano straps.