Rolex · Day-Date 36

Strap for Day-Date 36 White Gold - Diamond / Turquoise / President

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
Reference128349RBR-0031 (aka: M128349RBR-0031)
FamilyDay-Date 36
MovementRolex caliber 3255 hours, minutes, seconds | date, day | chronometer
Year2023
CaseWhite Gold

Recommended spring bar

Spring bars Rolex Daytona 116520 — 20mm steel

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

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Straps for the Day-Date 36 128349RBR-0031 (aka: M128349RBR-0031)

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 128349RBR-0031 (aka: M128349RBR-0031), seen from the bench

The Day-Date 36 features the self-winding 3255 caliber with hour, minute, second, date and day of the week indications. The movement is chronometer certified and provides a power reserve of approximately 70 hours. The 36mm case is paired with 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 128349RBR-0031?

The lug width of the Day-Date 36 128349RBR-0031 is 20 millimetres. This measurement represents the distance between the two case lugs. To verify compatibility, measure the internal space between the lugs using a ruler. Any strap with a 20mm lug width terminal will be perfectly compatible with this reference.

Which strap is most suitable for a white gold Rolex Day-Date 36?

For a white gold Day-Date 36, an alligator strap from the Mississippi remains the most aristocratic choice: its fine grain and natural patina complement the white gold perfectly. Alternatively, vegetable-tanned calf leather offers versatility and develops a rich patina over time. For formal occasions, Shell Cordovan guarantees durability and natural lustre. Vulcanised rubber straps are ideal for more dynamic everyday contexts.

How do I change the strap on a Rolex Day-Date 36 128349RBR-0031?

Strap replacement requires a spring bar removal tool. Place the watch on a soft surface with the strap facing upwards. Insert the tool into the slot beside the upper lug and press gently downward to release the spring bar, then remove the old strap. Insert the new strap by aligning the terminals to the lugs and press until it clicks into place. If you are not experienced, entrust the operation to a professional service to avoid damaging the case.

What is the average lifespan of a leather strap for this model?

A quality leather strap for the Rolex Day-Date 36 has an average lifespan of 3-5 years with daily use. This duration depends on: material (alligator and Shell Cordovan last longer than standard calf), tanning method (vegetable-tanned leather ages better), frequency of use, and environment (humidity and perspiration accelerate wear). Vulcanised rubber straps have a superior lifespan (5-8 years) as they resist moisture and temperature fluctuations more effectively.

Are aftermarket straps truly compatible with the Rolex Day-Date 36?

Yes, an aftermarket strap (non-Rolex) with 20mm lug width terminals is completely compatible with the 128349RBR-0031. Compatibility depends solely on lug width, not the strap manufacturer. Artisanal straps from MilanoStraps, crafted with premium leather and bespoke construction, offer build quality comparable to original Rolex straps, often with greater customisation and material selection. Always verify lug width before purchase.

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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