Strap for Datejust 31 Rolesor Yellow Domed Diamond / Oyster / Black MOP

The Rolex Datejust 31 178343-0008 has a lug width of 16mm. This measurement is specific to the 31mm case size and is not interchangeable with the 18mm or 20mm straps fitted to larger Datejust references. To verify the measurement, place a digital calliper between the two lower lugs, perpendicular to the vertical axis of the watch.

For the Datejust 31 178343-0008 in yellow Rolesor configuration with a mother-of-pearl dial, vegetable-tanned alligator is the reference choice for formal occasions: the natural belly grain contrasts with the dial's iridescence on distinct aesthetic levels. Polished box calf in warm tones (cognac, ivory) is a sound everyday alternative that complements the yellow gold lugs. For sporting use, vulcanised rubber maintains the movement's 100m water resistance while retaining a refined appearance.

To replace the strap on the Datejust 31 178343-0008, a 1.8mm springbar tool is required to compress the spring bars laterally and release them from the lugs. It is advisable to work on a soft surface to avoid scratching the yellow gold case components. Alternatively, Casati Milano atelier offers a strap-fitting service by appointment.

Yes. Any strap with a 16mm lug width is technically compatible with the Datejust 31 178343-0008. Milano Straps offers a curated selection of handcrafted 16mm straps in alligator, calf leather, shell cordovan and rubber, made with stitching and thickness calibrated for the feminine proportions of this reference. The buckle or deployant clasp should be proportionally sized, ideally between 14mm and 16mm in width.

The longevity of a leather strap depends on leather quality, tanning method and daily use. A vegetable-tanned alligator strap of high quality, worn regularly but not intensively, will retain its structural and aesthetic integrity for 3 to 6 years. Shell cordovan, owing to the density of its fibres, tends to last longer whilst developing a distinctive patina. Prolonged exposure to perspiration, water and cosmetics accelerates deterioration; in such contexts it is advisable to rotate multiple straps or opt for vulcanised rubber.