Rolex
Datejust 31 178274-0079— lug 16mm

The Rolex Datejust 31 ref. 178274-0079 features a lug width of 16mm. This measurement is specific to the 31mm variant of the Datejust family and differs from the 20mm of the Datejust 41 and the 18mm of the 36mm model. For a precise fit, any aftermarket strap must measure exactly 16mm at the attachment point, verified with a digital calliper between the lugs.

For the Datejust 31 in steel and white gold, a vegetable-tanned alligator strap with symmetrical belly grain is the most coherent choice given the watch's formal character. Box calf leather offers a progressive patina suited to daily wear, whilst shell cordovan provides an unusual, long-lasting texture. On light-coloured dials, a burgundy or midnight blue strap enhances the white gold indices effectively.

The strap on the Datejust 31 is secured to the lugs via 16mm springbars. To replace it, insert a forked springbar tool between the strap and the lug to compress the springbar ends and release them. Care should be taken to avoid scratching the steel or white gold case surfaces. If in doubt, it is advisable to consult a watchmaker or the Casati Milano atelier.

Yes. Any strap with a 16mm attachment width and standard springbars is compatible with the Rolex Datejust 31 ref. 178274-0079. Milano Straps offers a curated selection of 16mm handcrafted straps in alligator, calf leather, shell cordovan, NATO and rubber, available either bespoke or ready to ship. Buckle and deployant finishes in steel or white gold can be matched to the watch's bezel.

The lifespan of a leather strap depends on the material, tanning method and frequency of use. A quality vegetable-tanned alligator strap, properly conditioned and kept away from prolonged moisture, typically lasts 2 to 4 years with daily wear. Box calf and shell cordovan are generally more resistant to surface wear. Milano Straps provides an 18-month guarantee against manufacturing defects on all its straps.