Rolex · Day-Date 36

Strap for Day-Date 36 Yellow Gold Fluted / Oyster / Silver

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
Reference118238-0164
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 118238-0164

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118238-0164, seen from the bench

The Rolex Day-Date 36 118238-0164 is a 36mm solid yellow gold automatic watch introduced in 1956 as the world's first timepiece with a complete calendar (day and date in separate windows). It houses the Perpetual caliber 3155 movement, an evolution of the 3135, featuring a balance cock and COSC chronometer certification. The movement oscillates at 28,800 vph with a 48-hour power reserve and incorporates a Parachrom escape wheel for enhanced magnetic resistance. The 20mm lug width is proportionally calibrated to the compact 36mm case diameter and requires precise measurement to ensure proper fit and avoid accelerated wear.

Frequently asked questions

What lug width does the Rolex Day-Date 36 118238-0164 have?

The Rolex Day-Date 36 118238-0164 features a lug width of 20 millimetres. This is the exact distance between the metal pins (lugs) of the yellow gold case. The 20mm lug width is specific to this compact model and dictates every aftermarket strap choice. It is essential to verify that your chosen strap is precisely calibrated for 20mm, otherwise the fit will be defective or the pin will experience accelerated wear.

Which strap material do you recommend for the Day-Date 36 in yellow gold?

For the Day-Date 36 118238-0164 in yellow gold, we recommend medium brown or cognac alligator, which amplifies the warm tone of the metal. Black shell cordovan represents the alternative of greatest formal refinement. Vegetable-tanned calf leather offers a versatile solution with natural ageing characteristics. We advise against rubber and fabrics, which conflict with the presidential purpose of the watch. A two-tone deployante clasp permits practical rotation between straps without pin enlargement.

How do I change the strap on my Day-Date 36 118238-0164?

Changing the strap on the Day-Date 36 requires a quality spring bar removal tool. Remove the original strap by unscrewing the pins from the inner side of the case. Position the new 20mm strap, aligning the holes perfectly with the lugs, then reinsert the pins. Ensure the strap is completely seated on both sides before wearing the watch. If uncertain, entrust the task to a professional watchmaker to avoid damage to the case.

Which aftermarket strap is compatible with the 118238-0164?

Any strap with a 20 millimetre lug width is compatible with the Day-Date 36 118238-0164, provided it respects standard pin thickness (approximately 4–5mm). On MilanoStraps you will find a selection of 20mm straps in alligator, shell cordovan, natural calf and rubber, curated for construction quality and aesthetic proportion with the model. Avoid generic straps: the Day-Date deserves craftsmanship and finishing consistent with the watch's dignity.

How long does a natural leather strap last on a Day-Date 36?

A natural leather strap (alligator, cordovan, calf) on a Day-Date 36 worn daily typically lasts 3–5 years. Longevity depends on usage frequency, ambient humidity and maintenance. Leather wears primarily at the buckle and flex points; grain naturally develops patina. Vegetable-tanned leather permits partial regeneration by lubricating the strap with appropriate creams. MilanoStraps artisanal straps carry an 18-month warranty against manufacturing defects; regular maintenance significantly extends useful life.

The next step

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