Strap for Datejust 31 Rolesor Yellow Domed / Oyster / Silver Computer

The Rolex Datejust 31 with reference 178243-0029 is equipped with 16-millimetre lugs. This width is specific to the 31mm version and differs from the Datejust 36, which uses 20-millimetre lugs. Measuring the lug width means calculating the distance between the inner edges of the two lug seats: on the 178243-0029, this measurement is always 16mm. It is essential to use straps compatible with this width to avoid damage to the lug seats and the strap itself.

For the Datejust 31 Rolesor 178243-0029, we recommend alligator in caramel or chocolate-brown tones to maximise harmony with the yellow gold case. Alternatively, jet-black alligator creates an elegant contrast. For superior daily durability, calf leather with vegetable tanning develops a natural patina that personalises the watch over time. If you seek exceptional longevity and are willing to invest, shell cordovan offers compact fibres that resist decades of wear. Avoid saturated red or fluorescent materials that contrast with Rolex's classical aesthetic.

Changing the strap is a straightforward manual operation. Procure a lug removal tool (available online or at jewellery retailers). Position the watch on a soft surface, locate the small lateral holes in the lug seat, and insert the tool into the hole, applying gentle lateral pressure to release the internal spring. The lug will lift, allowing removal of the old strap. To fit the new strap, insert both ends into the lug seats and press until you hear a click. If you are not comfortable with this operation, entrust the task to a professional watchmaker or Casati Milano, which offers a changing service with warranty.

Yes, provided the strap is specifically designed for the 16-millimetre lug width. Quality aftermarket straps, such as those handcrafted by Milano Straps, are constructed to the same Rolex original specifications. Compatibility is guaranteed if the width is exact. Avoid generic or poorly measured straps: a width less than 16mm will not fit correctly into the lug seats, whilst a width greater than 16mm risks damaging them. Always verify dimensions before purchase and select manufacturers that offer warranty against manufacturing defects.

Durability depends on the material and usage pattern. High-quality alligator with vegetable tanning resists approximately 5–8 years with moderate daily wear. Calf leather with vegetable tanning lasts 3–5 years under normal conditions. Shell cordovan is exceptional: if properly cared for, it exceeds 10–15 years without replacement. Exposure to moisture, perspiration and sunlight accelerates ageing. Casati Milano provides an 18-month warranty against manufacturing defects on all handcrafted straps, though natural leather wear is not covered. We recommend rotating multiple straps to distribute wear loading.