Rolex
Datejust 31 278273-0017— lug 16mm

The lug width of the Rolex Datejust 31 278273-0017 is 16mm. This measurement refers to the internal gap between the case lugs and is the key parameter when selecting a compatible replacement strap. It is advisable to confirm this with a digital calliper before purchasing a new strap.

For the Rolex Datejust 31 278273-0017 in yellow Rolesor configuration, an alligator strap with vegetable tanning is the most coherent choice for its formal register. Box calf leather is well-suited for daily business wear, while vulcanised rubber maintains the Oyster waterproofing for active use. Casati Milano crafts bespoke straps tapered to 14mm at the buckle end, profiled specifically for 16mm Rolex lugs.

Replacing the strap on a Rolex Datejust 31 requires a spring bar tool to release the spring bars between the lugs. Work on a soft surface to protect the caseback and bezel. If you are not experienced with this procedure, it is recommended to consult a watchmaker or visit the Casati Milano atelier, where strap fitting is included with every bespoke order.

Yes, high-quality aftermarket straps are available for the Rolex Datejust 31 278273-0017. Casati Milano produces handcrafted straps with a 16mm lug width in alligator leather, box calf, shell cordovan and vulcanised rubber. Each strap is profiled to fit Rolex lugs precisely, with spring bars included and an 18-month guarantee against manufacturing defects.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily usage. A high-grade vegetable-tanned alligator strap, properly maintained by avoiding prolonged contact with water and perspiration and treated with leather conditioner, can last between three and seven years while retaining its structural and aesthetic integrity. Shell cordovan develops a distinctive patina over time that enhances its appearance. Casati Milano provides an 18-month guarantee against production defects.