Rolex · Datejust 36

Strap for Datejust 36 Stainless Steel / Everose / Fluted / Slate Roman Diamond / Oyster

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter36 mm
Reference126231-0024
FamilyDatejust 36
MovementRolex caliber 3235 hours, minutes, seconds | date | chronometer
Year2018
CaseRose Gold, Stainless Steel

Recommended spring bar

Modern Rolex spring bars 20mm — 1.5mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.5 mm · closed lugs

All Rolex spring barsOpen →

Straps for the Datejust 36 126231-0024

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Datejust 36 126231-0024, seen from the bench

The Datejust 36 represents the evolution of the model introduced by Rolex in 1945, the first automatic wristwatch with a date indication. It is powered by the automatic Caliber 3235 with chronometer certification, providing indications of hour, minute, second and date. 36mm case with 20mm lugs in reference 126231-0024.

Frequently asked questions

What is the exact lug width of the Rolex Datejust 36 ref. 126231-0024?

The lug width of the Datejust 36 reference 126231-0024 is precisely 20 millimetres. This measurement represents the distance between the two lugs (the metal pins) that secure the strap to the case. Any strap with a 20mm lug width will fit correctly on your watch, whether it's vegetable-tanned leather, technical rubber, NATO fabric, or shell cordovan.

What is the best strap for the Rolex Datejust 36 126231-0024?

The optimal strap choice depends on your daily use and aesthetic preferences. For formal contexts, an alligator strap with vegetable tanning in cognac or dark brown tones complements the Everose® gold beautifully. For everyday versatility, a soft Nappa calf in cognac offers both elegance and comfort. For sportier occasions, a NATO in shell cordovan or raw linen maintains the Datejust's dignity whilst enhancing its functionality. At Casati Milano, you can personally select materials and colours in the atelier, tailored to your wrist and lifestyle.

How do you change the strap on a Rolex Datejust 36 126231-0024?

Strap replacement requires a spring bar tool (a specific device with two rounded ends) and extreme care. Position your watch on a stable surface, insert the tool into the small lateral holes beneath the spring bar and gently lift until the pin releases. Repeat on the other side, then remove the old strap. Insert the new 20mm strap, aligning the holes with the pins, and press until you hear an audible click. If you prefer to avoid the risk of scratching the case, Casati Milano offers professional strap changes in the atelier by appointment.

Is an aftermarket strap compatible with the Datejust 36 126231-0024?

Yes, any high-quality aftermarket strap with a 20mm lug width is fully compatible with your Datejust 36 126231-0024. Artisanal straps from Casati Milano—crafted from premium leather including alligator, calf, shell cordovan, and technical rubber—meet or exceed Rolex's construction standards. The key advantage of aftermarket straps lies in aesthetic customisation: choose the colour, texture, and leather type that best suits your personal style and lifestyle.

How long does a leather strap last on a Rolex Datejust 36?

A high-quality leather strap, such as those handcrafted by Casati Milano, typically lasts 3–5 years of daily wear, depending on usage frequency and climate conditions. Vegetable-tanned leather develops a natural patina over time, which enhances its aesthetic character. With regular gentle cleaning and application of dedicated leather conditioner, longevity can be extended significantly. Casati Milano provides an 18-month warranty against manufacturing defects: should the strap fail due to construction issues, it will be replaced at no cost.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only