Rolex
Datejust 31 178273-0010— lug 16mm

The Rolex Datejust 31 ref. 178273-0010 requires a strap with a lug width of 16mm. This measurement should be taken with a digital calliper directly between the lugs at the attachment point to ensure a precise fit and correct aesthetic alignment.

For the Datejust 31 in steel and yellow gold, a vegetable-tanned alligator strap with a regular belly grain is the most technically and aesthetically coherent choice. Cognac, tobacco, and bordeaux tones complement the fluted yellow gold bezel. Box-calf leather or shell cordovan are excellent alternatives for everyday robustness with their own distinct character.

The strap is removed using a spring bar tool or pointed lug tool to release the 16mm spring bars from the lugs. Work on a soft surface to avoid scratching the case. Quality aftermarket straps typically include the appropriate spring bars. If in doubt, it is advisable to consult a watchmaker or the Casati Milano atelier.

Yes. Many artisan manufacturers produce straps compatible with a 16mm lug width suitable for the Datejust 31. A curated selection filtered by this size is available on milanostraps.it, including options in alligator, calf leather, shell cordovan, and technical materials. Compatibility is ensured by the standard 16mm attachment width.

Longevity depends on the material and daily use. A high-quality vegetable-tanned alligator strap, handled with care and kept away from water and excessive perspiration, can last between 3 and 7 years while developing a desirable patina. Box-calf has a similar lifespan. Shell cordovan, thanks to its dense fibre structure, tends to be the most durable among classic leathers. Milano Straps provides an 18-month guarantee covering manufacturing defects.