Rolex · Day-Date 36

Strap for Day-Date 36 Yellow Gold Diamonds / President Diamonds / Silver Diamond

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
Reference118388-0008
FamilyDay-Date 36
MovementRolex caliber 3155 hours, minutes, seconds | date, day | chronometer
CaseYellow 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 118388-0008

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118388-0008, seen from the bench

The Day-Date was introduced in 1955 as the first automatic wristwatch to indicate the day and date in full. It houses the automatic 3155 caliber with chronometer certification and dual day indication. 36mm case with 20mm lugs, available exclusively in precious metals.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 reference 118388-0008?

The lug width of the Rolex Day-Date 36 118388-0008 is 20 millimetres. This measurement, taken between the two vertical attachment points on the case, is the standard specification for this particular model and ensures absolute compatibility with straps designed for this geometry. Verify your measurement by removing the original strap and measuring the free space between the lug attachments perpendicular to the dial.

Which strap should I pair with the yellow gold Rolex Day-Date 36 118388-0008?

For a yellow gold Day-Date 36, the optimal combinations are dark brown alligator, burgundy shell cordovan, or natural tobacco vegetable-tanned leather. Alligator emphasises formal solemnity and the luminosity of gold. Cordovan develops an evolved patina over time. Vegetable-tanned leather maintains biological authenticity without competing with the dial. Each choice substantially alters the watch's aesthetic perception.

How do I change the strap on my Rolex Day-Date 36 118388-0008?

Changing the strap on a Day-Date 36 requires removing the lug bars through specific extraction pins. Position the watch on a stable surface, locate the pins (typically positioned at the case sides), use an appropriate tool to gently extract the metal bars, and remove the original strap. Insert the new strap ensuring the lugs are completely seated in the attachments. If you are inexperienced, consult an authorised service centre or specialised artisan.

Is an aftermarket strap compatible with the Rolex Day-Date 36 118388-0008?

Yes, any high-quality strap with a 20mm lug width is compatible with the Day-Date 36 118388-0008. An aftermarket strap created by specialised artisans can offer broader material choices—certified alligator, vintage cordovan, vegetable tanning—and personalised execution compared to original Rolex options. Compatibility depends solely on lug width, not brand.

What is the lifespan of a leather strap on a Rolex Day-Date 36?

The lifespan of a leather strap depends on tanning type, intensity of use, and maintenance care. High-quality alligator typically lasts 3–5 years; shell cordovan 4–7 years owing to superior fibre density; vegetable tanning 2–4 years, with visible ageing accelerated. A leather strap requires protection from excessive moisture, rapid drying after water exposure, and periodic conditioning with strap-specific balms to maintain elasticity and durability.

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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