Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel / Yellow Gold / Diamond / MOP / Jubilee

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width16 mm
Case diameter31 mm
Reference278383rbr-0028
FamilyDatejust 31
MovementRolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer
CaseMother of Pearl | Yellow Gold, Stainless Steel

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Straps for the Datejust 31 278383rbr-0028

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The Datejust 31 278383rbr-0028, seen from the bench

The Rolex Datejust 31 ref. 278383rbr-0028 combines Oystersteel and 18k yellow gold in Rolesor construction, featuring a natural mother-of-pearl dial with diamond indices and a 31mm case diameter. Powered by the Rolex 2236 movement (COSC-certified chronometer, +4/-6 seconds daily tolerance) with silicon Syloxi balance and Paraflex shock resistance, it offers 100m water resistance. The 16mm lug width is specific to this Datejust 31 family with original Jubilee or Oyster bracelet and requires precise measurement for aftermarket strap compatibility.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278383rbr-0028?

The Rolex Datejust 31 ref. 278383rbr-0028 features a lug width of 16mm. This measurement is specific to the Datejust 31 family and should be confirmed with a calliper by measuring the internal distance between the two lugs before purchasing an aftermarket strap.

What is the best strap for the Rolex Datejust 31 278383rbr-0028?

For the Datejust 31 in yellow Rolesor with a mother-of-pearl dial, the most suitable straps are in burgundy or bordeaux alligator, which complement the warm tones of the yellow gold, or in smooth dark navy calf leather for a more contemporary contrast. A yellow gold or gold-filled deployant clasp is the natural finishing touch to preserve the metallic coherence of the Rolesor combination.

How do you change the strap on a Rolex Datejust 31 278383rbr-0028?

To replace the strap on the Datejust 31 ref. 278383rbr-0028, a 1.5mm springbar tool is required. Carefully lever between the lug and the springbar to release the attachment bar, then insert the new 16mm strap and refit the springbar until it clicks securely into place. It is advisable to work on a soft cloth to protect the diamond-set bezel.

Are there aftermarket straps compatible with the Rolex Datejust 31 278383rbr-0028?

Yes, high-quality aftermarket straps are available for the Datejust 31 ref. 278383rbr-0028. The lug width is 16mm. Milano Straps offers a curated selection of handcrafted straps in this size, made from alligator, calf leather and other premium materials, with bespoke clasp or deployant options. It is important to ensure the strap is fitted with standard 1.5mm springbars for a secure attachment.

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

The longevity of a leather strap depends on material quality and daily care. A high-grade alligator or vegetable-tanned leather strap, used regularly but kept away from water and excessive perspiration, will retain its aesthetic and structural properties for 2 to 5 years. Milano Straps provides an 18-month guarantee against manufacturing defects. The patina that develops over time on quality leathers is considered an asset rather than a flaw.

The next step

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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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Casati Milano · Via XX Settembre 15, Milan · by appointment only