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Rolex · Datejust 31

Strap for Datejust 31 Stainless Steel / Yellow Gold / Diamond / Champagne / Oyster

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

Lug width

16mm
16 mm strapsAll Rolex
Lug width16 mm
Case diameter31 mm
Reference278383rbr-0013
FamilyDatejust 31
MovementRolex caliber 2236 hours, minutes, seconds | date | chronometer
Year2018
CaseYellow Gold, Stainless Steel

Spring bar

Spring bars for Rolex

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

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Straps for the Datejust 31 278383rbr-0013

Selected for the 16 mm lug width

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The Datejust 31 278383rbr-0013, seen from the bench

The Datejust 31 is equipped with the Rolex caliber 2236 automatic movement with hour, minute, second and date functions. The case has a diameter of 31mm with 16mm lugs. The movement is COSC certified as a chronometer for timekeeping precision.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 reference 278383rbr-0013?

The lug width measures 16 millimetres. This specification is essential when selecting aftermarket strap alternatives. Always verify by placing a digital calliper on the inner shoulders of the lugs, measuring from edge to edge.

Which strap pairs best with the Datejust 31 two-tone configuration?

Alligator in dark cognac represents the classical choice for this variant: the natural grain regularity harmonises elegantly with yellow gold reflections. For contemporary versatility, vegetable-tanned calf in tobacco tone develops a natural patina over time.

How does one change the strap on a Rolex Datejust 31?

Use a dedicated strap removal tool to extract the lug pins (spring and iron pin). Position the watch on a soft base and operate on a single lug at a time, applying graduated outward pressure. Insert the new strap by reversing the procedure. Consult a specialist atelier if lacking experience.

Will an aftermarket strap with 16mm lug width remain compatible with reference 278383rbr-0013?

Yes, any strap equipped with 16-millimetre lugs (confirmed by construction specifications) will remain compatible. However, verify that leather thickness and stitching quality do not generate lateral friction against the case profiles.

What is the typical lifespan of a natural leather strap?

A quality strap in alligator, shell cordovan, or vegetable-tanned calf, used daily and subjected to routine maintenance (cleaning and conditioning every 12 months), achieves a lifespan between 5 and 8 years. The patina developing over time represents value, not deterioration.

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