Rolex
Datejust 31 278344RBR-0037— lug 16mm
Rolex Datejust 31 278344RBR-0037: 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 278344RBR-0037The essential strap measurement.
Browse 16mm straps →278344RBR-0037
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 278344RBR-0037?
The Rolex Datejust 31 reference 278344RBR-0037 has a lug width of 16mm. This is a specific, non-standard size in the aftermarket strap sector, requiring dedicated production to ensure a proper fit to the case.
What is the best strap for the Rolex Datejust 31 278344RBR-0037?
For a two-tone case in Oystersteel and white gold, the most suitable materials are alligator in cool tones (navy blue, slate grey, burgundy) and shell cordovan for those seeking a natural patina. A deployant clasp in steel or white gold is the most coherent closure with the watch's original design.
How do you change the strap on a Rolex Datejust 31?
The strap is removed using a dedicated springbar tool or a lever-type tool. You need to compress the springbars connecting the strap to the case lugs. It is advisable to work on a soft surface to protect the dial and case, or to rely on a watchmaker or the Casati Milano atelier.
Are there aftermarket straps compatible with the Rolex Datejust 31 278344RBR-0037?
Yes. Milano Straps produces aftermarket straps specifically for the 16mm lug width of the Datejust 31, with shaped ends to respect the curvature of Rolex lugs. Available models can be found in the 16mm strap section of the catalogue.
How long does a leather strap last on a Rolex Datejust 31?
Longevity depends on the material and usage. A quality alligator strap typically lasts 2–4 years with daily wear. Shell cordovan, thanks to its dense fibre structure, tends to last longer while developing a characteristic patina. All Casati Milano straps carry an 18-month warranty 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