Rolex · Day-Date 36

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

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
Reference118238-0194
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 118238-0194

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118238-0194, seen from the bench

The Rolex Day-Date 36 Yellow Gold reference 118238-0194 is an automatic chronograph watch featuring a 36mm case in 18-carat yellow gold with a fluted bezel and black dial. The watch is powered by the Rolex caliber 3155 automatic movement with Perpetual rotor and bidirectional winding, certified chronometer with precision of +2/-2 seconds per day. The case features a screw-down crown and Oyster back, water-resistant to 100 meters. The 20mm lug width ensures compatibility with standard watch straps. This classic model combines timeless proportions with robust construction.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 reference 118238-0194?

The Rolex Day-Date 36 reference 118238-0194 features a lug width of 20mm. This dimension is critical for strap compatibility, as any aftermarket strap with a 20mm lug width will fit perfectly onto the case lugs. The 20mm measurement is standard across many mid-sized Rolex models and is universally available among premium strap makers.

What type of strap is best suited to the Day-Date 36 in yellow gold?

For a Day-Date 36 in yellow gold, leather straps represent the quintessential and most refined choice. Alligator or Taurillon calf leather are ideal for emphasising the formal elegance of the case. For daily versatility, a Shell Cordovan offers exceptional durability and develops a distinctive natural patina. Rubber or NATO straps are contemporary alternatives, though yellow gold demands a classical foundation to maintain aesthetic coherence.

How do you change the strap on a Rolex Day-Date 36?

Changing the strap on a Day-Date 36 requires a spring bar tool. Position the watch with the case facing upward, and gently push the spring bar using the tool until the metal pin is freed. Once extracted, the strap will separate from the case. To install your new 20mm strap, insert the pin into both attachment points and push until you hear a click. If uncertain, we recommend visiting an authorised service centre.

Is an aftermarket strap truly compatible with the 118238-0194?

Yes, any artisanal strap with a 20mm lug width is mechanically compatible with the 118238-0194. The key is verifying the actual lug opening (the internal section where the pin fits). A high-quality artisanal strap, crafted by specialised ateliers such as Casati Milano, guarantees precise tolerances and zero lateral play, preserving the structural integrity of the case.

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

A quality leather strap—particularly one crafted from alligator, Taurillon calf, or Shell Cordovan—typically lasts 3–5 years with daily wear. This longevity depends on frequency of use, exposure to moisture, and maintenance. Vegetable-tanned leather straps tend to develop a refined patina and may last considerably longer. Casati Milano provides an 18-month warranty against manufacturing defects, covering delamination or construction flaws.

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