Rolex · Day-Date 36

Strap for Day-Date 36 Everose Domed / President / Chocolate

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
Reference118205f-0142
FamilyDay-Date 36
MovementRolex caliber 3155 hours, minutes, seconds | date, day | chronometer
CaseRose 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

All Rolex spring barsOpen →

Straps for the Day-Date 36 118205f-0142

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118205f-0142, seen from the bench

The Rolex Day-Date 36 118205f-0142 in 18-karat Everose gold exemplifies understated elegance since its 1956 introduction as the first automatic chronometer with dual calendar windows. The 36 mm case paired with the 20 mm lug width accommodates moderate-thickness straps while maintaining proportional balance. The in-house caliber 3155 self-winding movement delivers COSC-certified precision and approximately 70 hours of power reserve, making this instrument the choice of decision-makers and collectors who value time without ostentation.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118205f-0142?

The lug width of the Rolex Day-Date 36 118205f-0142 is 20 millimetres. This measurement corresponds to the horizontal distance between the two lugs on the case and is the standard specification for all Day-Date models in this generation. Verifying this dimension before purchasing an aftermarket strap is essential to ensure geometric compatibility and prevent lateral spillage.

What is the best strap to pair with the Day-Date 36 118205f-0142 in rose gold?

Cognac alligator represents the most elegant aesthetic match, as the characteristic crocodile grain naturally complements the warmth of 18-carat rose gold. High-level alternatives include shell cordovan, which develops a deep patina over time, or vegetable-tanned calf leather for those preferring a contemporary interpretation. The optimal choice depends on intended use and context: textured leather for formal occasions, FKM rubber for sporting or humid environments.

How do you change the strap on the Rolex Day-Date 36 118205f-0142?

Changing the strap requires a dedicated spring bar removal tool to open and close the case lugs. Position the current strap on a work surface, insert the flat blade of the extraction tool into the small hole on the end of the lug, push upward to compress the internal spring, and extract the pin. Repeat on the opposite side. Thread the new 20mm strap by reversing this procedure. We recommend executing this operation with care to avoid scratching the case.

Is a strap compatible with the Day-Date 36 118205f-0142 a certified aftermarket product?

Yes, certified aftermarket straps compatible with the 20mm lug width of the Day-Date 36 118205f-0142 are available from specialised manufacturers. Brands such as Casati Milano produce artisanal leather straps in full-grain, alligator, and shell cordovan using sartorial standards, with an 18-month warranty covering manufacturing defects. Compatibility is guaranteed by the standardisation of lug width; however, we always recommend verifying technical specifications before purchase.

What is the service life of a leather strap for the Rolex Day-Date 36 118205f-0142?

A high-quality leather strap (alligator, cordovan, or vegetable-tanned calf) typically lasts between 3 and 7 years depending on daily use, maintenance, and climate exposure. Vegetable-tanned leather develops a patina that can extend its aesthetic appeal beyond this window, whilst alligator maintains longer structural stability. Visible wear (thinning of the strap, microscopic creasing) is natural and can be addressed through professional reconditioning. Internal spring deterioration represents the biological limit—after 5–6 years of intensive use, spring replacement may become necessary.

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