Rolex
Datejust 31 278245-0027— lug 16mm

The Rolex Datejust 31 reference 278245-0027 has a lug width of 16mm. This measurement is taken between the two horizontal lugs of the case using a digital calliper. The closing end of the strap is typically 14mm or 16mm depending on the taper selected.

For an Everose gold case of 31mm diameter, a vegetable-tanned alligator belly strap is the most coherent choice with fine watchmaking tradition. Alternatively, polished boxcalf leather or shell cordovan offer different textures equally compatible with the warm aesthetic of rose gold. Cognac, burgundy, and midnight blue are the most effective colour combinations.

Strap replacement requires a spring bar tool (0.8mm tip) to remove the spring bars securing the bracelet or strap to the case lugs. Work on a soft surface to avoid scratching the gold case. If unfamiliar with the process, it is advisable to consult a watchmaker or visit the Casati Milano atelier by appointment.

Yes. Any strap with a 16mm attachment width and standard spring bars is compatible with the Datejust 31 278245-0027. It is essential that the strap specifies a 16mm lug width and the desired closing width (14mm or 16mm). Milano Straps offers a dedicated selection of handcrafted 16mm straps compatible with this reference.

Longevity depends on the material and frequency of use. A quality vegetable-tanned alligator strap, properly maintained (leather conditioner every 2–3 months, kept away from moisture), can last 3 to 6 years with daily wear. Shell cordovan tends to have superior longevity due to the density of its fibres. Milano Straps straps include an 18-month warranty against manufacturing defects.