Rolex
Datejust 31 178288-0076— lug 16mm

The Rolex Datejust 31 reference 178288-0076 is equipped with a 16mm lug width. This measurement is specific to the model and ensures correct visual proportions between the 31mm case and the strap. Before purchasing an aftermarket strap, it is essential to verify that the attachment is exactly 16mm to ensure a snug fit without lateral play.

For a yellow gold Rolex Datejust 31, alligator remains the most cohesive choice from both aesthetic and tactile perspectives. Its natural texture dialogues perfectly with the purity of the precious metal. Noble alternatives include vegetable-tanned calf leather (which develops an amber patina with age) and shell cordovan (which offers intrinsic luminosity). In warm seasons, a satinised FKM rubber strap maintains elegance without adding weight to the wrist.

Changing the strap on a Datejust 31 requires a specific tool to remove the spring bars that connect the strap to the case. Rolex supplies this tool at the time of purchase. Simply position the spring bar parallel to the strap and push gently to release it from the lug. Once the old strap is removed, insert the new one onto the same spring bars and verify the fit is secure without forcing. If you feel uncertain, a jeweller or specialist watchmaker can complete the operation in minutes.

Yes, provided the strap is constructed specifically for 16mm lugs and features attachments (lugs) with identical thickness and bore diameter to Rolex specifications. A generic "16mm lug" strap may not guarantee the desired fit if it does not respect Rolex tolerances. Bespoke straps of quality, such as those from Casati Milano, are built to measure, verifying millimetre tolerances and compatibility with your specific reference.

The lifespan of a leather strap depends on usage, leather composition, and maintenance. Superior-quality vegetable-tanned alligator can last 5-7 years with moderate daily use; excellent calf leather 4-6 years. Factors that shorten lifespan include prolonged sun exposure, constant humidity, frequent contact with chlorinated water. The ideal solution is to own at least two straps for the same watch and alternate them seasonally, allowing each strap to "breathe" and dry completely.