Rolex
Datejust 31 178344-0003— lug 16mm

The lug width of the Rolex Datejust 31 ref. 178344-0003 is 16 mm. This is a non-standard measurement: using an 18 mm strap will result in lateral play and undue pressure on the case lugs. Always verify the lug width with a digital calliper before purchasing a replacement strap.

For the Datejust 31 178344-0003 in white gold and steel, an alligator strap in black or burgundy with vegetable tanning offers the most coherent pairing with the 18ct white gold bezel. Shell cordovan is an excellent choice for those who appreciate a strap that develops a distinctive patina over time. Box calf leather suits everyday elegant wear.

The strap on a Rolex Datejust 31 is removed using a spring bar tool to compress the spring bars within the 16 mm lugs. The procedure is fully reversible and does not require a watchmaker, though care should be taken to avoid scratching the white gold case during the operation.

Yes. Aftermarket straps must have a lug width of exactly 16 mm and are available in various materials including alligator leather, calf leather, shell cordovan, NATO nylon and vulcanised rubber. Milano Straps offers a dedicated selection of handcrafted 16 mm straps fully compatible with the Datejust 31.

The lifespan of a leather strap depends on material quality and care. A vegetable-tanned alligator strap, used carefully and kept away from prolonged moisture, can last between three and five years while developing an attractive patina. Shell cordovan typically offers greater durability. Daily exposure to humidity or perspiration will significantly shorten the leather's life.