Rolex
Datejust 31 278341rbr-0020— lug 16mm

The Rolex Datejust 31 ref. 278341rbr-0020 has a lug width of 16mm. This measurement should be taken with a digital calliper placed between the two lugs at the point where they meet the case. Using a strap of exactly 16mm is essential to ensure correct seating on the spring bars and to preserve the visual symmetry of the Everose Rolesor case.

For the Datejust 31 in Everose Rolesor, a semi-gloss vegetable-tanned alligator strap is the most harmonious choice, complementing the warm tones of the rose gold without competing with them. Box-calf leather offers versatility for everyday wear, while shell cordovan suits evening pairings. A rose gold deployant clasp maintains metallic consistency with the case across any material.

Strap replacement on the Datejust 31 requires a fine-tipped spring bar tool to release the 16mm spring bars seated within the lugs. Work on a soft surface to avoid scratching the case. If you are unfamiliar with the process, a watchmaker or the Casati Milano atelier can perform the fitting professionally upon appointment.

Yes. The aftermarket offers a range of 16mm straps in leather, rubber, and fabric compatible with the Datejust 31. Milano Straps provides a curated selection of handcrafted 16mm straps designed to complement the aesthetic of the Everose Rolesor case. Always verify the lug width (16mm) and keeper width before purchasing.

Longevity depends on the material, frequency of wear, and maintenance. A quality alligator strap, properly conditioned and kept away from moisture and perspiration, can last three to five years while retaining structural integrity. Box-calf leather typically lasts two to three years but develops a distinctive patina with age. Shell cordovan is the most durable option due to its dense fibre structure.