Strap for Datejust 31 Stainless Steel Diamond / Oyster / Pink MOP - Roman

The Rolex Datejust 31 ref. 178384-0068 has a lug width of 16 mm. This measurement is specific to the Datejust 31 range and is not interchangeable with the 20 mm lugs of the Datejust 41 or the 18 mm lugs of other Rolex models. Before purchasing any aftermarket strap, it is advisable to verify the measurement directly on the case using a digital calliper.

For a Datejust 31 with a mother-of-pearl dial and white Rolesor case, the most suitable materials are belly alligator in neutral tones (ivory, pearl grey, powder pink), vegetable-tanned calfskin with a smooth finish, and shell cordovan for a slim profile. The choice depends on the intended use: evening or daily wear. A deployant clasp or buckle in steel or white gold maintains metallic coherence with the case.

Strap replacement requires removing the spring bars from the case lugs using a dedicated spring bar tool to avoid scratching the white Rolesor. The procedure is fully reversible and does not require a watchmaker's intervention, though professional assistance is recommended to preserve the integrity of the lugs. The 16 mm lug width of the 178384-0068 is compatible with all standard 16 mm straps fitted with 1.5 mm spring bars.

Yes. Any strap with a 16 mm attachment width is technically compatible with the case of the Datejust 31 ref. 178384-0068. Milano Straps offers a selection of handcrafted straps in alligator, calfskin, shell cordovan and vulcanised rubber in 16 mm, available ready to ship or made to order. Casati Milano also offers a bespoke service with leather selection at the Milan atelier.

Longevity depends on the material, frequency of use and care. A quality alligator strap, properly tanned, maintains its integrity for between three and five years with regular use. Vegetable-tanned calfskin develops a patina over time but is more susceptible to moisture. Shell cordovan is among the most durable due to the density of its fibre. Milano Straps provides an 18-month guarantee against manufacturing defects on all Casati Milano straps.