Technical Archive

Rolex
Datejust 31 178279-0041— lug 16mm

Rolex Datejust 31 178279-0041: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Datejust 31 White Gold Fluted / President / Blue

Artisanal Note

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

Technical Specifications

Rolex 178279-0041
Lug Width
16 mm

The essential strap measurement.

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Reference

178279-0041

Movement

Rolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Rolex Datejust 31 reference 178279-0041 is a 31mm white gold case with 18-carat construction, featuring the Rolex caliber 2235 movement, a third-generation manufacture caliber with Parachrom balance wheel and Microstella fine-tuning system. The watch offers approximately 48 hours of power reserve and carries COSC chronometer certification. The lug width is 16mm, a critical specification for ensuring proper mechanical fit and aesthetic coherence when selecting an aftermarket strap.

FAQ

What is the lug width of the Rolex Datejust 31 178279-0041?

The Rolex Datejust 31 reference 178279-0041 features a 31mm case with a lug width of 16mm. This measurement refers to the internal distance between the two lugs at the spring bar attachment point. It is the critical dimension to verify before purchasing any aftermarket or replacement strap.

What is the best strap for the Rolex Datejust 31 178279-0041?

For the Datejust 31 in white gold, the most fitting materials are vegetable-tanned alligator — prized for its three-dimensional grain and long-term patina — and shell cordovan for those seeking a compact surface with distinctive visual depth. A tapered strap from 16mm to 14mm enhances the feminine proportions of the case. A deployant clasp extends the life of the leather strap by reducing daily stress on the lug attachment.

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

To replace the strap on a Datejust 31, the spring bars connecting the bracelet or strap to the case lugs must be removed. The operation requires a spring bar tool or a fine flat-blade screwdriver. Insert the tool into the lateral hole of the lug, compress the spring and slide out the bar. Care must be taken to avoid scratching the white gold case surface. If in doubt, entrust the operation to a qualified watchmaker or the Casati Milano atelier.

Are there aftermarket straps compatible with the Rolex Datejust 31 178279-0041?

Yes, there are aftermarket straps made specifically for the 16mm lug width compatible with the Rolex Datejust 31. Milano Straps produces handcrafted straps in leather, alligator, shell cordovan and other materials with a 16mm attachment, available online or customisable to order at the Casati Milano atelier. Millimetre-precise construction ensures both compatibility and long-term durability.

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

The lifespan of a leather strap depends on the material, care, and frequency of use. A high-quality alligator or shell cordovan strap with vegetable tanning can last between 3 and 7 years if kept away from water, excessive perspiration, and direct heat sources. Using a deployant clasp significantly reduces daily stress on the lug attachment, extending the strap's service life. Milano Straps leather straps come with 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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The atelier's website: casatimilano.com