Rolex
Datejust 31 178313-0064— lug 16mm

The Rolex Datejust 31 ref. 178313-0064 features a lug width of 16mm. This measurement is fixed and should be taken internally between the two lugs at their narrowest point using a digital calliper. All compatible straps must specify 16mm as the attachment width.

For a mother-of-pearl dial with a Rolesor case combining yellow gold and Oystersteel, a vegetable-tanned alligator strap in tabac or dark brown is the most technically coherent choice. The natural scale grain complements the iridescence of the dial without competing with it. Burnished shell cordovan is a refined alternative for those who prefer a grain-free surface texture.

To replace the strap on the Datejust 31, you will need a fine-tipped spring bar tool with a 1mm or 1.2mm tip. The spring bars are located within the lugs at 6 and 12 o'clock. Compress one end of the spring bar against the inner lug wall, slide the strap free, then reverse the process to fit the new strap. Work on a soft surface to avoid scratching the Oystersteel case.

Yes. Any strap with a 16mm lug width and standard spring bars is technically compatible with the Datejust 31. Milano Straps crafts bespoke straps for this lug width in alligator, calf leather, shell cordovan and rubber. The level of artisanal construction can equal or exceed that of manufacturer accessories, with full personalisation of colour, texture and clasp.

A high-quality leather strap — vegetable-tanned alligator or shell cordovan — worn daily typically lasts between 2 and 4 years. Longevity depends on exposure to water, perspiration and skin care products. Using a deployant clasp significantly reduces mechanical stress on the leather, extending its service life. Periodic conditioning with natural wax protects the fibres and delays cracking.