Rolex
Datejust 31 278289rbr-0017— lug 16mm

The Rolex Datejust 31 with reference 278289rbr-0017 features a lug width (ansa) of exactly 16mm. This precise measurement is critical for selecting compatible straps: even a slightly narrower or wider lug will compromise both fit and the visual balance of the watch.

This Datejust 31 in white gold with diamond settings calls for understated elegance. An alligator strap in white or black with vegetable tanning complements the precious metal without competing with the stones; alternatively, a warm-toned Fjord or Nubuck calf (aged brown, cognac) creates a refined contrast. NATO straps or rubber would break the linguistic code of this piece.

To replace the strap on your 31mm Datejust with 16mm lugs, use a dedicated spring bar tool or Teflon strap to carefully disengage the spring bars from inside the lugs. Do not force: the bars are small and easily lost. If unfamiliar with the procedure, consult an official Rolex service centre or certified watchmaker. Casati Milano offers telephone support during bespoke fitting.

Yes, provided the strap has 16mm lug width compatibility and the spring bars are correct. Choose craftsmen who understand Rolex's construction standards: leather must be finished at the terminals, stitching must be water-resistant, and the deployant clasp must be proportional to the case. Milanostraps allows you to browse verified 16mm straps that fit within minutes.

A quality handcrafted leather strap with vegetable tanning lasts typically 3–5 years with daily wear, developing a beautiful patina over time. Longevity depends on sweat exposure, humidity, sunlight and cleaning frequency. Shell cordovan, being denser, can reach 7–8 years. Casati Milano provides 18 months' warranty against manufacturing defects, and straps can be reconditioned or rewoven via professional restoration.