Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel Diamond / Oyster / White - Roman

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
Reference278384rbr-0013
FamilyDatejust 31
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2020
CaseWhite 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 278384rbr-0013

Selected for the 16 mm lug width

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The Datejust 31 278384rbr-0013, seen from the bench

The Datejust 31 represents the 31mm version of Rolex's Datejust collection. It features the automatic caliber 2236 with chronometer certification and date indication. The case has 16mm lugs and offers hour, minute, second and date functions.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 reference 278384rbr-0013?

The Rolex Datejust 31 ref. 278384rbr-0013 features a lug width of 16 millimetres. This measurement corresponds to the distance between the case lugs where the strap anchors via articulation pins. It is critical to verify this specification before purchasing an aftermarket strap to ensure constructive compatibility.

Which strap material is most suitable for the Datejust 31 278384rbr-0013?

Alligator represents the pinnacle choice owing to its natural grain and aesthetic versatility. For daily wear, vegetable-tanned calf leather develops a time-worn patina that dialogues elegantly with the case's compact proportions. Shell cordovan represents the option for those seeking constructive uniqueness and extreme longevity. All materials are recommended with a deployante clasp.

How is the strap changed on a Rolex Datejust 31?

The procedure requires specialist tools: a spring bar removal tool to release the articulation pins. Position the watch with the case stable, gently insert the tool beneath the lug, applying consistent pressure to free the pin from its housing. Alternate the procedure on both sides to avoid case damage. If inexperienced, consult an authorised Rolex service centre.

Is it possible to use an aftermarket strap compatible with the Datejust 31 ref. 278384rbr-0013?

Yes, provided the strap possesses a lug width of exactly 16 millimetres and the pins are compatible with Rolex standard specifications. Milano Straps offers a comprehensive collection of artisanal 16mm straps specifically curated for this reference, with 18-month guarantee on manufacturing defects when purchased through Casati Milano atelier.

What is the expected lifespan of a leather strap on a Rolex Datejust 31?

Durability depends on material, frequency of use and climatic conditions. Vegetable-tanned calf leather guarantees 3-5 years of daily wear before replacement becomes necessary. Alligator and shell cordovan offer superior longevity, extending to 7-10 years. Accelerated ageing in humid environments or prolonged sun exposure can reduce these timeframes. Regular maintenance (cleaning, humidity protection) extends operational lifespan.

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