Rolex
Datejust 31 278285rbr-0012— lug 16mm

The Rolex Datejust 31 ref. 278285rbr-0012 has a lug width of 16mm. This measurement is specific to the entire Datejust 31 family and is not interchangeable with other Datejust references. To verify it accurately, use a digital calliper to measure the internal distance between the two lugs at the base of the case.

For the Datejust 31 in Everose gold with a diamond-set bezel, a vegetable-tanned Mississippiensis alligator strap with a rose gold deployante or buckle is the most technically coherent choice. The belly scales complement the Jubilee bracelet pattern without competing with it. Shell cordovan in bordeaux or cognac tones offers a refined formal alternative with excellent surface finish.

The strap on a Rolex Datejust 31 is removed using spring bar tools inserted into the lug holes. A curved-tip spring bar tool is recommended. Place the caseback on a soft cloth or cushion to avoid scratching the case. When fitting an aftermarket 16mm strap, ensure the spring bars are compatible with the diameter and thickness specific to Rolex lugs.

Yes. Compatible aftermarket straps must have a 16mm attachment width, a tapered profile to follow the oyster case curvature, and spring bars of the appropriate diameter for Rolex lugs. Milano Straps offers handcrafted leather, rubber, and fabric straps specifically calibrated for 16mm, available online and in bespoke configuration at Casati Milano atelier.

Longevity depends on material and usage. A quality vegetable-tanned alligator strap, worn regularly in non-sporting contexts, retains its structural and aesthetic integrity for between three and six years. Shell cordovan is among the most durable options due to the density of its fibres. Regular exposure to perspiration, water or perfume accelerates deterioration; in such cases, alternating with a vulcanised rubber strap is advisable.