Rolex
Datejust 31 178344-0061— lug 16mm

The lug width of the Rolex Datejust 31 ref. 178344-0061 is 16mm. This measurement should be taken with a digital calliper placed inside the lugs at their narrowest point, where the strap makes direct contact. Always verify this dimension before purchasing an aftermarket strap.

For the Datejust 31 178344-0061, featuring a white gold case and diamond-set bezel, a vegetable-tanned alligator strap is the most coherent choice given the formal nature of the piece. Alternatively, smooth box-calf leather or shell cordovan develop an appreciable patina over time. A 16mm deployant clasp in steel or white gold is the recommended fastening.

To replace the strap on the Datejust 31 178344-0061, a dedicated springbar tool is required. The 16mm springbars are released by applying gentle pressure in the lug hole between the lug and the strap. It is advisable to work on a soft surface and, if in doubt, to consult a watchmaker or the Casati Milano atelier to avoid scratching the white gold case.

Yes, there are numerous aftermarket straps compatible with the Datejust 31 178344-0061. The key technical specification is a lug width of 16mm. Milanostraps.it offers a dedicated selection of 16mm straps in various materials — alligator, calf leather, shell cordovan, and NATO — crafted by hand and compatible with the lug geometry of this reference.

The lifespan of a leather strap depends on the material, frequency of use, and care. A quality vegetable-tanned alligator strap worn daily typically lasts 2 to 4 years before significant wear appears at the buckle or keeper. Box-calf has a similar lifespan. Rotating between straps, storing them away from direct light, and drying them after moisture exposure will considerably extend their service life.