Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel/ Rose Gold / Domed - Diamond / Silver - Floral / Oyster

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
Reference278341RBR-0031 (aka: m278341rbr-0031)
FamilyDatejust 31
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2023
CaseRose Gold, Stainless Steel

Spring bar

Spring bars for Rolex

The right category for this model · choose the 16 mm size

Straps for the Datejust 31 278341RBR-0031 (aka: m278341rbr-0031)

Selected for the 16 mm lug width

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The Datejust 31 278341RBR-0031 (aka: m278341rbr-0031), seen from the bench

The Rolex Datejust 31 reference 278341RBR-0031 features a 31.00 mm case in Everose Rolesor, combining 904L Oystersteel and 18-karat Everose gold. It houses the Rolex caliber 2236, a COSC-certified chronometer movement with approximately 55 hours of power reserve. The dial features baguette diamonds on the bezel and a brilliant finish; functions include hours, minutes, central seconds, and date window with Cyclops lens at 3 o'clock. Water-resistant to 100 meters with Oyster case and Twinlock crown. Lug width is 16 mm.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 278341RBR-0031?

The Rolex Datejust 31 278341RBR-0031 has a lug width of 16mm. This measurement defines strap compatibility and should be verified using a calliper to measure the internal distance between the two lugs of the case.

What is the best strap for the Rolex Datejust 31 278341RBR-0031?

For the Datejust 31 in Everose Rolesor, an alligator strap paired with a rose gold buckle or deployant clasp is the most coherent aesthetic choice. A vegetable-tanned calf leather develops a personal patina over time, while shell cordovan offers a dense, long-lasting surface. All straps must be 16mm at the lug.

How do you change the strap on the Rolex Datejust 31 278341RBR-0031?

To remove the original Oyster or Jubilee bracelet, use a 1.0–1.2mm springbar tool or a flat-tipped lever tool inserted into the gap between the lug and the springbar. Work on a soft surface to protect the case. For integrated bracelet models, professional intervention by a watchmaker or specialist atelier is recommended.

Are there aftermarket straps compatible with the Rolex Datejust 31 278341RBR-0031?

Yes. Any strap with a 16mm lug width and standard springbars is compatible. Milanostraps.it offers a curated selection of handcrafted 16mm straps in various materials, tailored to the proportions of the 31mm Oyster case. Ensure the strap ends are shaped to fit the case lug curvature correctly.

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

Longevity depends on the material and frequency of use. A quality alligator strap, with regular wear and proper care — kept away from prolonged water exposure and perspiration — typically lasts 2–4 years before showing structural wear. Shell cordovan, with its denser fibre structure, can last 5–7 years. 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.

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