Rolex · Datejust 31

Strap for Datejust 31 Everose Fluted / President / Pink 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
Reference178275f-0029
FamilyDatejust 31
MovementRolex caliber 2235 Hours, Minutes, Seconds | Date | Chronometer
CaseRose Gold

Spring bar

Spring bars for Rolex

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

Straps for the Datejust 31 178275f-0029

Selected for the 16 mm lug width

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The Datejust 31 178275f-0029, seen from the bench

The Datejust 31 is equipped with the Rolex 2235 automatic caliber, chronometer certified, which provides indication of hours, minutes, seconds and date. The case measures 31mm with 16mm lugs. The movement guarantees chronometric precision according to COSC standards.

Frequently asked questions

What is the exact lug width of the Rolex Datejust 31 178275f-0029?

The lug width of the Rolex Datejust 31 178275f-0029 is precisely 16 millimetres. This specific measurement is characteristic of the 31mm Datejust version and represents the space where the watch strap attaches to the case lugs. When selecting an aftermarket strap, it is essential to verify that the lug width is exactly 16mm to ensure a correct and proportionate fit.

What type of strap is best suited for the Datejust 31 in rose gold?

For a Datejust 31 178275f-0029 in Everose gold, alligator leather with vegetable tanning and natural grain is the ideal choice: it amplifies the chromatic richness of the gold without competing with its luminosity. Alternatively, vegetable-tanned calf leather developed to a natural finish creates a more intimate dialogue with the wrist. For those seeking contemporary aesthetics, shell cordovan offers an almost porcelain-like lustre that transforms the Datejust into a more modern interpretation. All these materials achieve perfect proportional balance with the 16mm lugs of this model.

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

The strap is changed by removing the spring bars—small metal pins that connect the strap to the case. Using a specialised tool (spring bar tool), gentle pressure is applied to the sides of the spring bars to release them from the attachment holes in the case. Once freed, the old strap can be removed and the new one inserted, allowing the spring bars to click back into the case attachments. For a precise operation without risk of scratching the case, it is advisable to entrust this task to an experienced watchmaker or to request the service at our atelier.

What is a quality aftermarket strap compatible with the Datejust 31 178275f-0029?

Quality aftermarket straps for the Datejust 31 178275f-0029 must feature a lug width of exactly 16 millimetres and be crafted from noble materials such as alligator, vegetable-tanned calf, shell cordovan, or premium NATO fabric. On milanostraps.it you will find a curated selection of artisanal straps specifically made for this lug width, or you can request a bespoke strap from the Casati Milano atelier where every detail is personalised according to your leather, colour, and finish preferences.

How long does a leather strap last on a watch worn daily?

The lifespan of a leather strap depends on the frequency of wear, the type of tanning, and the level of maintenance. A high-quality strap made with vegetable tanning and worn daily typically has an estimated life of 3 to 5 years before requiring replacement. Factors such as sun exposure, moisture, and perspiration accelerate the leather's ageing. With proper maintenance (avoiding prolonged water exposure, keeping away from heat sources, periodically hydrating with specialist creams), it is possible to significantly extend durability. Casati Milano straps include an 18-month warranty against manufacturing defects, but leather is a living material that continues to develop patina and character over time.

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