Rolex · Datejust 36

Strap for Datejust 36 Rolesor Yellow Domed / Oyster / Black

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
Reference116203-0126
FamilyDatejust 36
MovementRolex caliber 3135 hours, minutes, seconds | chronometer
Year2018
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 116203-0126

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 116203-0126, seen from the bench

The Rolex Datejust 36 Rolesor Yellow reference 116203-0126 combines 18kt yellow gold and stainless steel in a two-tone case of 36.00mm diameter and 11.6mm thickness, featuring the iconic Cyclops lens magnifying the date window 2.5 times. The watch houses the automatic caliber 3135, a Chronometer-certified movement oscillating at 28,800 alternations per minute with a 22kt gold rotor, maintaining accuracy within -4/+6 seconds daily. The lug width is 20mm, the water resistance is 100 meters, and the model belongs to the Datejust collection, launched in 1945 as the first wristwatch with an automatic date window.

Frequently asked questions

What is the exact lug width of the Rolex Datejust 36 116203-0126?

The Rolex Datejust 36 116203-0126 features a lug width of 20mm. This measurement is the fundamental technical specification for selecting a compatible strap. You can verify this by measuring the distance between the spring bar pins that anchor the strap to the case, or by reading the stamping on the metal passants of the original Rolex strap. Any strap certified for 20mm lug width is fully compatible with your model.

Which strap material is best suited for the Datejust 36 116203-0126?

For a two-tone Rolex like the 116203-0126, alligator leather in dark shades (black, dark brown, burgundy) magnificently enhances the gold without competing with the case. If you prefer versatility, calf leather in a tobacco-brown tone or cordovan with vegetable tanning develops a natural patina over time, further ennobling the watch. Cotton NATO straps are less suited to the formality of a Datejust. Your choice depends on your dial colour and personal style preferences.

How do you change the strap on a Datejust 36 116203-0126?

To change the strap, use a spring bar tool (an instrument with two rounded tips). Insert one tip into the small lateral hole of the spring located beneath the lug, and gently lift upwards to release the pin. Repeat on the other side. Once the springs are released, the old strap slides away. Insert the new strap by threading the pin into the spring and pressing until you feel a click of engagement. If uncertain, an experienced watchmaker can complete the swap in minutes.

Can I use an aftermarket strap on my Rolex Datejust 36?

Yes, you may use quality-certified aftermarket straps, provided they respect the 20mm lug width specification. It is essential to select straps crafted from premium leather (alligator, calf, cordovan) to maintain the aesthetic dignity of the watch. Reliable brands and artisanal makers guarantee complete compatibility and chromatic finishes that enhance the two-tone case. Avoid inexpensive synthetic leather straps: they compromise the perceived value of your Rolex.

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

A quality leather strap (alligator, calf, cordovan) with vegetable tanning resists moderate daily wear for approximately 2–4 years, depending on sun exposure, water exposure, and humidity. Alligator and cordovan are more durable than standard calf. Leather ages naturally rather than wearing out: it develops a patina that increases the watch's aesthetic appeal. Experienced artisans can regenerate a worn strap by replacing only the leather whilst preserving the original buckle. We recommend checking the leather condition every 18 months and treating it with specialist creams to extend its lifespan.

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