Rolex
Datejust 31 278384rbr-0034— lug 16mm
Rolex Datejust 31 278384rbr-0034: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 16mm lug width to preserve the original sartorial balance."
Technical Specifications
Rolex 278384rbr-0034The essential strap measurement.
Browse 16mm straps →278384rbr-0034
Rolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer
The Heritage
Compatible Straps
Selected for the 16mm lug width of the Datejust 31
FAQ
What is the lug width of the Rolex Datejust 31 278384rbr-0034?
The Rolex Datejust 31 reference 278384rbr-0034 has a lug width of 16mm. This measurement is taken with a calliper positioned internally between the two lower lugs of the case, at the point where the springbars are inserted. It is a fixed specification for the entire Datejust 31 family and requires straps of exactly 16mm at the attachment end.
What is the best strap for the Rolex Datejust 31 278384rbr-0034?
For this white gold and steel model with a diamond-set bezel, alligator belly in neutral tones — ivory, pearl grey or cognac — provides the highest aesthetic consistency with the precious case materials. Smooth box-calf leather in burgundy or midnight blue offers a refined formal pairing. For versatile everyday wear, a vegetable-tanned leather strap develops a distinctive patina over time, highly appreciated by collectors.
How do you change the strap on a Rolex Datejust 31 278384rbr-0034?
To replace the strap, you need to remove the springbars connecting the bracelet or strap to the case lugs. A dedicated springbar tool is used, inserting the forked tip into the gap between the lug and the strap to compress and release the springbar. The operation requires care to avoid scratching the white gold lugs. For a watch of this value, it is advisable to entrust the operation to a qualified watchmaker or specialist atelier.
Are there aftermarket straps compatible with the Rolex Datejust 31 278384rbr-0034?
Yes. The Datejust 31 278384rbr-0034 uses a standard 16mm lug attachment compatible with any aftermarket strap of that width, provided the curvature of the strap end respects the profile of Rolex's Oyster lugs. Milano Straps offers a selection of handcrafted 16mm straps in various materials, all made with ends suitable for the Rolex Datejust 31 attachment.
How long does a leather strap last on a Rolex Datejust 31?
Longevity depends on leather quality, daily use and exposure conditions. A high-quality alligator or shell cordovan strap, kept away from excessive perspiration and water, maintains its structural and aesthetic integrity for 3 to 5 years with regular wear. Vegetable-tanned straps tend to develop a patina over time, which many enthusiasts regard as a positive quality. Casati Milano straps carry an 18-month guarantee against manufacturing defects.
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.
Request an appointment →By appointment only · Milan
The atelier's website: casatimilano.com