Rolex
Datejust 31 278243-0024— lug 16mm

The Rolex Datejust 31 reference 278243-0024 features a 31mm Oyster case with a lug width of 16mm. This measurement is taken with a digital calliper at the inner distance between the two lugs at the lower part of the case, where the strap is attached.

For the Datejust 31 278243-0024 with its mother-of-pearl dial and two-tone Rolesor construction, a wide-grain alligator strap with a glossy finish or a vegetable-tanned calfskin strap are the most coherent choices. The 16mm lug width is fully compatible with aftermarket handcrafted straps by Casati Milano. A deployant clasp in steel or yellow gold is the preferred closure for both practicality and strap longevity.

To replace the strap on the Datejust 31 278243-0024, use a fine-tipped springbar tool to remove the spring bars securing the strap to the lugs. Rest the watch on a soft surface to prevent scratching the case. The operation takes approximately two minutes and requires no professional tools, provided the correct 16mm lug width is used.

Yes, the aftermarket offers a wide range of 16mm straps compatible with the Datejust 31 278243-0024. Casati Milano crafts bespoke straps in alligator, calfskin, shell cordovan and rubber, with curved ends designed to follow the contour of the Oyster lugs. It is essential to confirm that the strap is specifically sized at 16mm at the attachment point and that the end curvature suits the 31mm Oyster case.

The lifespan of a leather strap depends on the quality of the tanning process, maintenance routine and daily wear. A high-grade alligator strap with saddle-stitched construction, conditioned every 12 to 18 months, can remain structurally sound for 5 to 8 years. Vegetable-tanned calfskin develops a natural patina over time but is more susceptible to moisture. Regular rotation between straps and avoidance of prolonged water exposure will significantly extend their service life.