Rolex
Datejust 31 178343-0016— lug 16mm

The lug width is 16mm. This is the distance between the terminal ends of the case where the strap is fitted. This dimension characterises the female-oriented Datejust 31 models and allows compatibility with a broad selection of artisanal straps calibrated to this standard.

For this Rolesor reference (yellow gold + steel) we recommend: alligator in cognac or brown tones to dialogue with the yellow gold, vegetable-tanned calf for natural patina development, or NATO nylon in bold colours for contemporary contrast. Selection depends on use context: formal elegance with alligator, daily sportive with calf or rubber, minimalist modern with NATO.

The Rolex strap is secured using spring bars inserted into the lateral lugs of the case. To change the strap: obtain a spring bar removal tool, insert the flat blade into the lug eyelet and compress the spring at the base of the bar, then extract gently; repeat on the opposite side. Insert the new bars into the alternative strap, align and press until it clicks. The procedure requires precision to avoid scratching the lugs.

Yes, entirely. Milano Straps artisanal straps calibrated to 16mm guarantee full compatibility with the Datejust 31 178343-0016. The important factor is verifying that the bars are 16mm (standard width) and that the strap is designed for this lug width. Artisanal quality also permits aesthetic personalisation: leather choice, tanning type, buckle colour and stitching style.

Durability depends on material and usage frequency. A high-grade alligator maintains structural integrity for 8–12 years with regular wear, developing prized patina over time. Vegetable-tanned calf has similar longevity but more marked aesthetic evolution. Wear to the passants is inevitable; with Casati Milano you receive a strap with an 18-month guarantee on manufacturing defects, and may commission specialised repairs to extend the strap's lifespan.