Strap for Datejust 31 Rolesor Yellow Domed / Jubilee / Black

The lug width of the Rolex Datejust 31 ref. 178243-0050 is 16mm. This is a non-standard measurement in the watch industry, narrower than the more common 18mm and 20mm sizes. For a proper replacement, it is essential to measure the internal gap between the lugs using digital callipers with the strap removed.

For the two-tone Datejust 31 in steel and yellow gold, the most suitable straps are in glossy alligator leather — whose geometric grain echoes the fluted bezel — or vegetable-tanned calf leather for those seeking a natural patina over time. Shell cordovan is a distinctive choice, while vulcanised rubber suits intensive daily wear. A yellow gold or gold-plated buckle or deployant clasp completes the chromatic pairing.

To remove the original Rolex strap, a fine-tipped springbar tool is required, inserted into the lateral slot of the lug to compress and extract the springbar. The operation calls for care to avoid scratching the 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 aftermarket straps compatible with the 16mm lug width of the Datejust 31 are available. Milano Straps offers a curated selection of handcrafted Italian straps in 16mm width, made with selected leathers and fitted with standard springbar attachments. It is important to check the taper profile and lug length to ensure optimal integration with the case.

The lifespan of a leather strap depends on the type of hide, care, and frequency of use. A quality alligator or shell cordovan strap, with regular maintenance and avoiding prolonged water exposure, can last between 3 and 7 years while retaining full structural integrity. Vegetable-tanned calf straps develop a prized patina and, if properly maintained, offer comparable longevity. Milano Straps provides an 18-month warranty against manufacturing defects.