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Rolex · Datejust 31

Strap for Datejust 31 Rolesor Yellow Diamond / Jubilee / Black Diamond

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Rolex
Lug width16 mm
Case diameter31 mm
Reference178383-0034
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

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Straps for the Datejust 31 178383-0034

Selected for the 16 mm lug width

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The Datejust 31 178383-0034, seen from the bench

The Rolex Datejust 31 178383-0034 is a mid-size timepiece featuring a 31mm Rolesor yellow case combining stainless steel and 18k yellow gold. It houses the Rolex caliber 2235 automatic movement, COSC-certified chronometer with ±2 seconds per day precision. The black diamond dial displays the date at 3 o'clock with Cyclops lens, yellow gold fluted bezel, and 16mm lug width. This balanced proportional design represents the Datejust family legacy since 1945, ideal for refined wrists without compromising dial readability and functionality.

Frequently asked questions

What is the lug width of the Rolex Datejust 31 178383-0034?

The Rolex Datejust 31 178383-0034 has a lug width of 16mm. This measurement should be taken between the inner faces of the lugs using a digital calliper and determines compatibility with any aftermarket strap.

What is the best strap for the Rolex Datejust 31 178383-0034?

For the Datejust 31 in Yellow Rolesor, the most suitable straps are alligator belly or vegetable-tanned calf leather in havana, cognac or bordeaux tones, paired with a deployant clasp in steel or yellow gold. Shell cordovan is the preferred choice for long-term formal daily wear.

How do you change the strap on the Rolex Datejust 31 178383-0034?

The strap is removed using a spring bar tool to release the 16mm spring bars housed within the lugs. The operation is fully reversible and does not require any intervention on the movement. It is advisable to work on a soft surface to protect the case and bracelet.

Are there aftermarket straps compatible with the Rolex Datejust 31 178383-0034?

Yes. Any strap with a 16mm attachment and standard length for a ladies' wrist (typically size S or M) is compatible with the Datejust 31 178383-0034. Milano Straps offers a dedicated selection of handcrafted leather, rubber and cordovan straps, all supplied with spring bars included.

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

Longevity depends on the material and care: an alligator or shell cordovan strap of quality construction, worn daily with proper care (avoiding prolonged water exposure and excessive perspiration), can last between 3 and 6 years whilst retaining its shape and patina. Vegetable-tanned calf leather has an average lifespan of 2 to 4 years, developing a distinctive personal patina 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