Technical Archive

Rolex
Datejust 31 278343rbr-0018— lug 16mm

Rolex Datejust 31 278343rbr-0018: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 31 Stainless Steel / Yellow Gold / Domed - Diamond / Grey - Roman / Jubilee

Artisanal Note

"This model requires a precise 16mm lug width to preserve the original sartorial balance."

Technical Specifications

Rolex 278343rbr-0018
Lug Width
16 mm

The essential strap measurement.

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Reference

278343rbr-0018

Movement

Rolex caliber 2236 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Datejust 31 represents the 31mm version of the Rolex Datejust collection. It features the automatic caliber 2236 with hour, minute, second and date functions, certified as a chronometer. Case diameter of 31mm with 16mm lugs.

FAQ

What is the lug width of the Rolex Datejust 31 278343rbr-0018?

The lug width of the Rolex Datejust 31 278343rbr-0018 is 16mm. This dimension is determined by the geometry of the 31mm case and must be respected rigorously to ensure correct fit of the strap to the spring bar attachments, without lateral play or visual misalignment.

What is the best strap for the Rolex Datejust 31 278343rbr-0018?

For the two-tone gold/steel 278343rbr-0018, alligator leather with vegetable tanning represents aesthetic excellence: the natural grain enhances the two-tone case's lustre, while the patina develops warm tones over time. Shell cordovan is ideal for formal occasions, European calf for daily versatility, rubber for dynamic urban contexts.

How do you change the strap on a Rolex Datejust 31?

Strap replacement requires extraction of the spring bars using a specialized tool (spring bar remover). It is advisable to entrust this to an expert to avoid case damage. Casati Milano offers this service in their atelier and can guide the process via WhatsApp for remote clients.

Which aftermarket straps are compatible with the Rolex Datejust 31 278343rbr-0018?

All straps with 16mm lug width are compatible with the 278343rbr-0018. Rolex models such as the Submariner 41, GMT-Master II, and Yacht-Master share this same lug width, broadening the range of available aftermarket personalisation options.

What is the average lifespan of a leather strap for the Rolex Datejust 31?

A high-quality alligator or calf strap with vegetable tanning has a lifespan of 4-6 years with daily use, variable depending on humidity, temperature, and maintenance. Rubber has similar durability but is less affected by humidity. Periodic restoration extends the functional and aesthetic life of the strap.

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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The atelier's website: casatimilano.com