Technical Archive

Rolex
Datejust 31 278381rbr-0026— lug 16mm

Rolex Datejust 31 278381rbr-0026: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 31 Stainless Steel/ Rose Gold / Diamond / MOP / Jubilee

Artisanal Note

"This model requires a precise 16mm lug width to preserve the original sartorial balance."

Technical Specifications

Rolex 278381rbr-0026
Lug Width
16 mm

The essential strap measurement.

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Reference

278381rbr-0026

Movement

Rolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Rolex Datejust 31 ref. 278381rbr-0026 features a 31mm Oyster case in Oystersteel and 18k Everose gold with an Everose fluted bezel. The mother-of-pearl dial is framed by a diamond-set bezel with brilliant round-cut stones. The watch is powered by the Rolex 2236 caliber, a manufacture movement with Syloxi silicon balance wheel and hairspring, offering approximately 55 hours of power reserve. The case provides water resistance to 100 meters via the Twinlock screw-down crown. Lug width is 16mm, requiring straps with precise 16mm termination to ensure proper fit to the curved Oyster lugs.

FAQ

What is the lug width of the Rolex Datejust 31 ref. 278381rbr-0026?

The lug width of the Rolex Datejust 31 ref. 278381rbr-0026 is exactly 16mm, measured between the two horns of the Oyster case at the strap attachment point. This is a dimension specific to the 31mm case size, distinct from the 20mm found on the Datejust 36. Straps must be produced to a precise 16mm width to ensure correct fitment.

What is the best strap for the Rolex Datejust 31 278381rbr-0026?

For the Datejust 31 in Everose Rolesor with a mother-of-pearl dial, an alligator strap in vegetable-tanned leather in shades of tobacco, bordeaux or greige offers the most coherent match: the grain texture complements the iridescence of the dial and harmonises with the warm tones of Everose gold. Smooth calf leather in ivory or greige is a more understated alternative. For aquatic environments, vulcanised rubber ensures durability while respecting the watch's water resistance rating.

How do you change the strap on the Rolex Datejust 31 ref. 278381rbr-0026?

To replace the strap on the Datejust 31 ref. 278381rbr-0026, a springbar tool is required to compress the spring bars housed in the lug holes. Care must be taken not to scratch the polished surfaces of the Oystersteel and Everose gold case. It is advisable to entrust the first strap change to a watchmaker or specialist atelier to avoid accidental damage.

Are there aftermarket straps compatible with the Rolex Datejust 31 278381rbr-0026?

Yes, the aftermarket offers straps compatible with the Rolex Datejust 31 at 16mm lug width. Milano Straps crafts bespoke straps in alligator, calfskin and other materials, precisely calibrated to 16mm with a profile suited to the Oyster lugs. It is essential to verify that the width is exactly 16mm and that the spring bar diameter matches the lug holes of this reference.

How long does a leather strap last on a Rolex Datejust 31?

The lifespan of a leather strap on a Rolex Datejust 31 depends on leather quality, tanning method and daily use. A high-grade alligator strap in vegetable-tanned leather, properly maintained and kept away from prolonged moisture and perspiration, can last between three and six years while developing a distinguished patina. Shell cordovan and premium calfskin straps behave similarly. Milano Straps provides an 18-month warranty against manufacturing defects on all its straps.

The next step

The right strap isn’t chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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