Rolex · Datejust 36

Strap for Datejust 36 Stainless Steel / Everose / Fluted / Chocolate Computer / 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
Reference126231-0025
FamilyDatejust 36
MovementRolex caliber 3235 Hours, Minutes, Seconds | Date | Chronometer
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

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Straps for the Datejust 36 126231-0025

Selected for the 20 mm lug width · workshop selection

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The Datejust 36 126231-0025, seen from the bench

The Datejust represents one of Rolex's historic models, introduced in 1945 as the first self-winding wristwatch with instantaneous date indication. Reference 126231 features the automatic Calibre 3235 with chronometer certification, equipped with functions of hours, minutes, seconds and date. 36mm case with 20mm lugs in Rolesor construction combining Oystersteel and Everose gold.

Frequently asked questions

What is the lug width of the Rolex Datejust 36 126231-0025?

The Rolex Datejust 36 reference 126231-0025 features a lug width of exactly 20 millimetres, measured between the internal spring bars. This specification was established by Rolex to maintain optimal proportions with the 36mm case. Always verify the measurement with callipers on your specific watch before purchasing a replacement strap.

Which strap is most suitable for the Rolex Datejust 36 126231-0025?

The ideal strap depends on your intended use. Alligator (with characteristic spine texture) delivers maximum formality and develops an elegant patina over time. Vegetable-tanned calf offers daily versatility and a soft grain that adapts to the wrist. For the rose gold and steel two-tone case, straps in dark brown, cognac or deep burgundy create superior aesthetic harmony compared to cool-toned options.

How do I change the strap on the Rolex Datejust 36 126231-0025?

Strap replacement requires a dedicated tool (strap removal pin or precision spring bar tool) to extract the spring bars securing the strap to the case. Place your watch on a soft cloth, locate the lateral spring bar on the non-crown side, and gently press it downward until it releases. Repeat on the opposite side. If uncertain, entrust the procedure to an authorised Rolex service centre or qualified watchmaker.

Are aftermarket straps compatible with the Datejust 36 126231-0025?

Yes, provided the strap features a certified 20-millimetre lug width and proportionate thickness to the case (typically 3.5–4mm). High-quality Italian artisanal straps in alligator, calf or shell cordovan with vegetable or synthetic tanning are entirely compatible. Ensure your supplier specifies the lug width and offers a product guarantee.

How long does a leather strap last on the Rolex Datejust 36 126231-0025?

Longevity depends on material and usage patterns. Vegetable-tanned calf typically endures 3–5 years of daily wear before replacement, though the patina improves with age. Alligator is more durable (5–8 years) and develops intrinsic beauty. Shell cordovan easily surpasses 10 years. Daily frequency of use, sunlight exposure and humidity affect lifespan. A well-maintained strap, not subjected to constant mechanical stress, may be restored rather than replaced.

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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