Rolex
Datejust 31 178343-0052— lug 16mm

The Rolex Datejust 31 178343-0052 has a lug width of 16 mm. This measurement is specific to the 31mm case size and differs from the 19mm of the Datejust 36 and the 20mm of sport models. To verify it, use a digital calliper to measure the internal gap between the two lugs at the point where they meet the case.

For the Datejust 31 178343-0052 in Rolesor yellow gold and stainless steel, the most suitable options are a glossy alligator strap — which enhances the warm reflections of the metal — or shell cordovan for those seeking an evolving patina and a more understated profile. Vegetable-tanned calf leather is ideal for everyday use. All straps must feature a 16 mm lug width to ensure a proper fit.

The strap on the Datejust 31 is removed by sliding out the spring bars using a dedicated spring bar tool with a forked or pointed tip. The 16 mm spring bars are extracted laterally from the lug channel. It is advisable to rest the case on a soft cushion to avoid scratching the case back or lugs. If you prefer not to proceed yourself, any qualified watchmaker or the Casati Milano atelier can perform the swap in a matter of minutes.

Yes. The Datejust 31 178343-0052 accepts any strap with a 16 mm lug width and standard spring bars. milanostraps.it offers a wide selection of handcrafted compatible straps — in leather, NATO and rubber — made specifically for this lug width, with finishing standards consistent with the quality of the original timepiece.

Longevity depends on the leather and care regime. A quality alligator strap, with regular use and appropriate maintenance (conditioning cream every 3–4 months, avoiding prolonged exposure to water and perspiration), can last between 3 and 5 years. Shell cordovan tends to last longer due to its dense fibre structure. Vegetable-tanned calf leather straps have an average lifespan of 2–3 years with daily wear.