Rolex
Datejust 31 278288rbr-0008— lug 16mm

The lug width of the Rolex Datejust 31 ref. 278288rbr-0008 is 16mm. This measurement should be taken with a digital calliper across the internal distance between the case lugs, with a manufacturing tolerance of ±0.1mm to ensure a precise and secure strap fitment.

For the yellow gold Datejust 31, a square-scale vegetable-tanned alligator strap is the most coherent choice for the watch's formal register. Polished calf leather is the more contemporary alternative. For everyday wear, a woven nylon NATO or vulcanised rubber strap offers durability without compromising the overall aesthetic.

The strap is removed using a double-ended springbar tool, applying gentle leverage on the spring bar inside the lug. It is advisable to work on a scratch-proof mat and, if you lack experience, to entrust the operation to a watchmaker or specialist atelier to avoid damage to the case or lug surfaces.

Yes. The aftermarket offers high-quality straps with a 16mm lug width compatible with the Datejust 31. It is essential to choose manufacturers working to precise dimensional tolerances (±0.1mm) and certified materials. Milano Straps offers a curated selection of artisan 16mm straps, with a bespoke option through the Casati Milano atelier.

Longevity depends on the material and conditions of use. A quality vegetable-tanned alligator strap, properly maintained and rotated regularly, can last between 2 and 5 years. Calf leather typically has a shorter lifespan of 1 to 3 years. Frequent exposure to perspiration, water, and perfume accelerates deterioration; leather straps should not be worn during sports or in humid environments.