Rolex · Datejust 36

Strap for Datejust 36 Stainless Steel / Yellow Gold / Smooth / Olive Green Roman Diamond / Jubilee

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
Reference126203-0025
FamilyDatejust 36
MovementRolex caliber 3235 Hours, Minutes, Seconds | Date | Chronometer
CaseYellow 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

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Straps for the Datejust 36 126203-0025

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 126203-0025, seen from the bench

The Datejust represents one of Rolex's historic models, introduced in 1945 as the first self-winding watch with an instantaneously changing date display. Reference 126203-0025 features the automatic Caliber 3235 with chronometer certification, offering hours, minutes, seconds and date functions. It features a 36mm case with 20mm lugs, crafted in a combination of stainless steel and yellow gold.

Frequently asked questions

What is the lug width of the Rolex Datejust 36 reference 126203-0025?

The lug width of the Rolex Datejust 36 ref. 126203-0025 is 20 mm. This dimension is measured internally from one lug shoulder to the other. It is essential to respect this exact measurement to ensure proper compatibility and secure strap attachment to the case without lateral tension.

What is the best strap option for the two-tone Datejust 36 yellow gold and steel?

For the Datejust 36 126203-0025 two-tone model, alligator leather in cognac or tobacco brown tones is the ideal choice: it enhances the warmth of yellow gold and creates elegant contrast with the steel. Alternatively, vegetable-tanned calfskin develops a patina over time, acquiring distinctive grain and depth that amplifies the interplay of metallic reflections. For sport-oriented use, Tropic rubber maintains formal aesthetics without functional compromise.

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

The strap is changed using a specialised pin removal tool. Position the watch on a soft support, identify the direction of pin extraction (indicated by small arrows on the caseback), and operate with care to avoid scratches. If you are not experienced, we recommend entrusting the task to an authorised Rolex dealer or specialised artisans such as Casati Milano.

Can you use an aftermarket strap on a Rolex Datejust 36 reference 126203-0025?

Yes, absolutely. The Datejust 36 with 20 mm lug width has access to a vast ecosystem of artisanal aftermarket straps. Specialised manufacturers such as milanostraps.it offer 20 mm straps in alligator, calfskin and rubber with construction quality comparable to genuine Rolex straps, at a fraction of the cost, with superior aesthetic customisation options.

What is the lifespan of a leather strap for the Rolex Datejust 36?

A quality leather strap, crafted in alligator or vegetable-tanned calfskin, typically lasts 3–5 years with daily wear and regular maintenance (cleaning and conditioning with appropriate creams). Tropic rubber straps have similar durability, with accelerated degradation from direct sunlight exposure. Casati Milano offers an 18-month warranty on manufacturing defects and can assist with strap restoration after natural wear.

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