Rolex · Datejust 31

Strap for Datejust 31 Rolesor Yellow Diamond / Jubilee / Champagne 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
Reference178383-0011
FamilyDatejust 31
MovementRolex caliber 2235 hours, minutes, seconds | date | chronometer
CaseYellow 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 178383-0011

Selected for the 16 mm lug width

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The Datejust 31 178383-0011, seen from the bench

The Rolex Datejust 31 reference 178383-0011 combines stainless steel Oystersteel and 18-karat yellow gold in the proprietary Rolesor construction. This 31mm case houses the automatic Rolex Caliber 2235 movement with COSC chronometer certification, featuring central hours, minutes, seconds and instantaneous date at 3 o'clock. Water-resistant to 100 meters, the watch features a fluted yellow gold bezel and integrated lugs characteristic of the Datejust family. The lug width is 16mm, requiring straps cut to this exact specification for precise fit and proper structural integrity.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178383-0011?

The lug width of the Rolex Datejust 31 178383-0011 is 16mm. This measurement is taken between the inner faces of the two lugs on the case and is the essential parameter for selecting a compatible strap. A strap of an incorrect width will not seat properly and may cause lateral play or damage to the spring bars.

What is the best strap for the Rolex Datejust 31 178383-0011?

For the Datejust 31 178383-0011 in yellow gold Rolesor configuration, an alligator strap in vegetable-tanned leather is the most coherent choice given the formal character of the watch. Calf leather or shell cordovan straps are excellent alternatives for everyday wear. For more active contexts, a vulcanised rubber or technical NATO strap can be considered, ideally paired with a yellow gold buckle or deployant clasp to maintain metallic consistency.

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

To change the strap on a Rolex Datejust 31, the spring bars connecting the strap to the case lugs must be removed. This requires a fine-tipped spring bar tool. It is advisable to work on a protected surface with the watch held securely. Alternatively, a watchmaker or the Casati Milano atelier can perform the replacement in a matter of minutes, preserving the integrity of the lugs.

Are there aftermarket straps compatible with the Rolex Datejust 31 178383-0011?

Yes, a wide range of aftermarket straps are compatible with the Rolex Datejust 31 178383-0011, provided they feature a 16mm lug width and standard 1.5mm diameter spring bars. Milano Straps offers handcrafted leather, rubber and nylon straps made to this specification, alongside fully bespoke options crafted at the Casati Milano atelier for those seeking complete personalisation.

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. An alligator or shell cordovan strap in vegetable-tanned leather, with regular conditioning and rotation with other straps, can last between 3 and 6 years while developing a distinguished patina. Calf leather straps typically have a shorter lifespan of 1 to 3 years, accelerated by exposure to perspiration and moisture.

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