Rolex · Datejust 31

Strap for Datejust 31 White Gold Fluted / President / Black

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
Reference178279-0046
FamilyDatejust 31
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
CaseWhite Gold

Spring bar

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Straps for the Datejust 31 178279-0046

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The Datejust 31 178279-0046, seen from the bench

The Rolex Datejust 31 reference 178279-0046 in 18-karat white gold features a 31 mm case with fluted bezel and black dial, paired with a five-link Jubilee bracelet in white gold. The movement is the Rolex caliber 2235, an automatic with bidirectional winding, approximately 48-hour power reserve, and COSC chronometer certification with ±2 seconds per day accuracy. The lug width is 16 mm, a non-standard size requiring precise measurement with digital calipers at the lug root; the slightly curved lugs typical of Oyster cases necessitate a strap with pre-curved ends or flexible leather.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178279-0046?

The Rolex Datejust 31 reference 178279-0046 has a lug width of 16 mm, measured at the root of the case between the inner walls of the lugs. This is a non-standard size in the mainstream strap market, so it is advisable to verify the measurement with a digital calliper before purchasing an aftermarket strap.

What is the best strap for the Rolex Datejust 31 178279-0046?

For the Datejust 31 178279-0046 in white gold, the most suitable straps are in alligator with Hornback or Mississippiensis grain in navy blue, dark anthracite or blackened brown tones, or in black Box Calf leather for a formal pairing. Shell cordovan in burgundy offers a warm contrast with the white gold case. The recommended closure is an ardiglione buckle or a deployant clasp in white gold at 16mm.

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

To replace the strap or bracelet on the Datejust 31, the springbars connecting the strap to the case lugs must be removed. A springbar tool is inserted into the lateral slot of the lug to compress the springbar ends and release the strap. It is advisable to work on a soft, dry surface to avoid scratching the 18-carat white gold case.

Are there aftermarket straps compatible with the Rolex Datejust 31 178279-0046?

Yes. Milanostraps.it offers handcrafted straps with a 16mm attachment specifically compatible with the Rolex Datejust 31 178279-0046. Each strap is made with pre-curved ends to fit the domed geometry of Oyster lugs, available in alligator, calf leather, shell cordovan and other selected materials. You can choose a model online or request a bespoke piece at the Casati Milano atelier.

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

The lifespan of a leather strap depends on the material, tanning process and conditions of use. An alligator strap with vegetable tanning, used daily with moderate exposure to water and perspiration, has an average lifespan of 2 to 4 years before the inner structure or outer surface shows signs of wear. Box Calf has a similar lifespan but lower resistance to moisture. Shell cordovan is the most resistant to repeated flexing. Regular conditioning with a suitable leather cream significantly extends the strap's life.

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