Rolex
Datejust 31 178245f-0001— lug 16mm

The lug width of the Rolex Datejust 31 Ref. 178245f-0001 is exactly 16mm. This dimension is determined by the architecture of the case lugs and does not vary. To measure your watch's lug width, use a digital calliper and measure the distance between the inner edges of the two lugs, excluding the spring bars themselves.

For the Datejust 31 in Everose gold, dark brown or cognac alligator represents the classic pairing, creating elegant contrast with the warm rose tone of the case. Alternatively, shell cordovan offers a patina that evolves over time, developing reflective qualities. Vegetable-tanned calf leather provides a sustainable option with excellent everyday versatility.

Strap replacement requires a spring bar tool to remove the suspension pins. Insert the tool into the small hole beneath the pin, remove the old pin and install a new one with the fresh strap. We recommend this operation at an authorised centre or with an experienced craftsman to avoid case damage. Casati Milano offers this service by appointment.

Yes, any 16mm artisanal strap is compatible with the Datejust 31 178245f-0001, provided it features standard spring bars. Milano Straps offers a dedicated collection of 16mm straps, all certified for tolerance and finishing standards. Always verify your watch brand before ordering and consider having the change made by a specialist.

The lifespan of a leather strap depends on use, material and maintenance. Alligator and shell cordovan maintain integrity for 4–8 years with regular wear. Vegetable-tanned calf has similar longevity, though it is more sensitive to humidity. Casati Milano guarantees 18 months against manufacturing defects and offers restoration services. The natural patina that develops is prized by those who appreciate aesthetic evolution over time.