Technical Archive

Rolex
Datejust 31 278274-0018— lug 16mm

Rolex Datejust 31 278274-0018: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 31 Stainless Steel Fluted / Jubilee / Green

Artisanal Note

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

Technical Specifications

Rolex 278274-0018
Lug Width
16 mm

The essential strap measurement.

Browse 16mm straps →
Reference

278274-0018

Movement

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

The Heritage

The Datejust 31 (ref. 278274-0018) features a 31mm Oystersteel case with 18K white gold components including fluted bezel, crown, and indices. Powered by the Rolex caliber 2236, a COSC-certified chronometer movement with Syloxi silicon balance wheel and hairspring, it guarantees precision within ±2 seconds per day. The watch is water-resistant to 100 meters and includes central hours, minutes, seconds, and date with Cyclops lens at 3 o'clock. The lug width is 16mm, proportionally matched to the 31mm case diameter.

FAQ

What is the lug width of the Rolex Datejust 31 278274-0018?

The Rolex Datejust 31 278274-0018 has a lug width of 16mm. This is a non-standard size compared to most mainstream Rolex sports models. Before purchasing an aftermarket strap, always verify this measurement using a calliper to check the internal distance between the lugs.

What is the best strap for the Rolex Datejust 31 278274-0018?

For the Datejust 31 278274-0018 in white gold and stainless steel, a vegetable-tanned alligator or shell cordovan strap is the most fitting choice, consistent with the formal character of the case. For more active settings, a fine-textured vulcanised rubber strap maintains the Oyster aesthetic. The correct strap width is 16mm.

How do you change the strap on a Rolex Datejust 31 278274-0018?

Strap replacement requires a spring bar tool or a thin flat-head screwdriver to remove the spring bars from the lugs. Work on a soft surface to avoid scratching the white gold case. If in doubt, it is advisable to rely on a professional watchmaker or a specialist atelier to ensure a precise, damage-free installation.

Are there aftermarket straps compatible with the Rolex Datejust 31 278274-0018?

Yes. Any aftermarket strap with a 16mm lug end is compatible with the Datejust 31 278274-0018. Ensure the width at the lug attachment is precisely 16mm and that spring bars are either included or available separately. Milanostraps.it offers a curated range of handcrafted 16mm straps made for this specific reference.

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

The lifespan of a leather strap depends on the material and care. A vegetable-tanned alligator strap, kept away from water and excessive perspiration and treated periodically with a leather conditioner, can last between 3 and 5 years with daily wear. Shell cordovan, owing to its dense, burnished structure, tends to develop a distinguished patina and can remain structurally intact well beyond 5 years.

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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