Strap for Datejust 31 White Gold Fluted / President / Black Diamond

The lug width of the Rolex Datejust 31 178279-0017 is 16 millimetres. This measurement represents the distance between the two spring bars protruding from the case lugs and determines compatibility with any aftermarket strap. Any strap with a 16mm lug width integrates perfectly without mechanical modification.

Alligator leather in vegetable tanning is the most prestigious choice: its natural grain texture dialogues elegantly with white gold and develops rich patina over time. An excellent alternative is shell cordovan, which offers intrinsic lustre and conscious ageing capability. For formal versatility, polished black box calf creates maximum contrast, accentuating the case's brilliance.

Strap replacement on a Datejust 31 requires a spring bar remover tool. Position the watch with lugs facing upward, insert the tool's flat screwdriver under the spring mechanism, apply gentle downward pressure to free the pin, then remove it. Repeat on the opposite side. Insert the new strap by aligning the holes with the case lugs and pushing the pin until it clicks into place.

Yes, any strap with a 16mm lug width is fully compatible with the 178279-0017. Artisanal brands such as Casati Milano, as well as specialist manufacturers, offer bespoke or ready-to-wear straps that integrate seamlessly. Always verify the lug width (16mm) before purchase.

Durability depends on material and wear patterns. Alligator or calf leather in vegetable tanning, worn daily, maintains structural integrity for 3–4 years. Shell cordovan can last up to 5 years due to leather density. Visual ageing (darkening, patina development) is natural and desirable, distinct from wear. Casati Milano straps include an 18-month warranty on manufacturing defects.