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
Reference178341-0007
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 178341-0007

Selected for the 16 mm lug width

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The Datejust 31 178341-0007, seen from the bench

The Datejust 31 ref. 178341-0007 is a Rolesor Everose dress watch with mother-of-pearl dial, combining 18-carat Everose gold with Oystersteel. The 31mm case houses the Rolex caliber 2235 movement with blue Parachrom balance wheel and approximately 48-hour power reserve, certified COSC chronometer (−2/+2 seconds per day). The Oyster case with screw-down caseback ensures water resistance to 100 meters. This model features a 16mm lug width with specific curved end profile required for strap attachment. The date window at 3 o'clock is instantly correctable via the screw crown.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178341-0007?

The lug width of the Rolex Datejust 31 178341-0007 is 16mm. This is the critical measurement to confirm before purchasing any aftermarket strap. The lugs on this reference require a strap with curved ends to ensure a flush fit against the Oyster case.

What is the best strap for the Rolex Datejust 31 178341-0007?

For the Rolesor Everose version with a mother-of-pearl dial, a vegetable-tanned alligator strap in bordeaux or cognac is the most coherent aesthetic choice. Box-calf leather in black or midnight blue offers a more formal, understated register. For mixed daily use, a high-quality vulcanised rubber strap provides durability and water resistance without compromising the watch's appearance.

How do you change the strap on a Rolex Datejust 31 178341-0007?

To replace the strap on the Datejust 31 178341-0007, the spring bars connecting the strap to the case lugs must be removed using a dedicated spring bar tool, applying gentle leverage within the lug slot. It is advisable to have this carried out by a watchmaker or qualified technician to avoid scratching the Rolesor Everose case.

Are there aftermarket straps compatible with the Rolex Datejust 31 178341-0007?

Yes. Aftermarket straps with a 16mm lug width and curved ends are compatible with the Datejust 31 178341-0007. milanostraps.it offers a curated selection of leather, NATO, and rubber straps already filtered for this specific lug width. For a fully bespoke strap with personal leather selection and made-to-measure construction, Casati Milano provides an appointment-based atelier service.

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, the tanning process, and daily use. A first-grade vegetable-tanned alligator strap, with proper care and regular rotation, can last between three and seven years while retaining its patina and structure. Prolonged exposure to water and perspiration accelerates deterioration; for a dress watch such as the Datejust 31, it is recommended to remove leather straps before any water exposure.

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