Rolex · Datejust 31

Strap for Datejust 31 Rolesor Everose Domed Diamond / Jubilee / MOP Roman

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
Reference178341-0005
FamilyDatejust 31
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
CaseMother of Pearl | Rose Gold, Stainless Steel

Spring bar

Spring bars for Rolex

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

Straps for the Datejust 31 178341-0005

Selected for the 16 mm lug width

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The Datejust 31 178341-0005, seen from the bench

The Datejust 31 ref. 178341-0005 is an iconic women's watch featuring a 31mm Rolesor Everose case combining 18k rose gold with 904L Oystersteel, paired with a unique mother-of-pearl dial that shifts with light. It houses the Rolex caliber 2235, a COSC-certified chronometer movement with ±2/-2 seconds daily precision, 48-hour power reserve, and Parachrom hairspring technology. The 16mm lug width is critical for proper strap fit on this Oyster case rated to 100 meters water resistance.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178341-0005?

The lug width of the Rolex Datejust 31 178341-0005 is 16mm. This measurement is taken with a digital calliper positioned internally between the two lugs, at the point where the strap meets the case back. Respecting this measurement precisely is essential to ensure a correct fit and seamless visual continuity between the case and the strap.

What is the best strap for the Rolex Datejust 31 178341-0005?

For the Datejust 31 178341-0005 in Everose Rolesor with a mother-of-pearl dial, an alligator belly strap in vegetable-tanned leather is the most coherent choice given the watch's formal register. Shades of burgundy, mahogany brown or midnight blue complement the rose gold case beautifully. Box calf leather offers everyday versatility, while a deployant clasp provides the highest level of wearing comfort.

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

Changing the strap on a Datejust 31 requires a fine-tipped spring bar tool to compress the retaining springs housed within the lugs. Insert the tip into the gap between the lug and the strap, compress the spring bar inward and slide the strap out laterally. Care must be taken not to scratch the Everose Rolesor lugs. For first-time operations, consulting a watchmaker or specialist atelier is strongly recommended.

Are there aftermarket straps compatible with the Rolex Datejust 31 178341-0005?

Yes, high-quality aftermarket straps compatible with the Datejust 31 178341-0005 are available. The key requirements are a 16mm lug width and correctly shaped strap ends to match the geometry of Rolex lugs. Milano Straps produces handcrafted straps specifically dimensioned for this model, available in alligator, calf leather, FKM rubber and nylon NATO, with a standard buckle or deployant clasp.

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

The lifespan of a leather strap depends on the quality of the hide, maintenance habits and frequency of wear. A high-grade vegetable-tanned alligator strap, used daily in rotation and properly cared for — avoiding prolonged contact with water and perspiration — can realistically last between 3 and 6 years. Periodic treatment with creams specifically formulated for exotic leather and rotating between multiple straps will significantly extend service life and preserve the original grain texture.

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