Rolex · Day-Date 36

Strap for Day-Date 36 Yellow Gold Diamonds / Oyster / 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
Reference118388-0065
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 118388-0065

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118388-0065, seen from the bench

The Day-Date 36 represents the contemporary version of the classic Rolex presidential watch, equipped with the automatic caliber 3155 certified chronometer. The 36mm case features hour, minute, second, date and day of the week indication. The model uses 20mm lugs and maintains the traditional technical characteristics of the Day-Date collection.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118388-0065?

The lug width of the Rolex Day-Date 36 118388-0065 is 20 millimetres. This dimension is determined by the distance between the case lugs and is a specific standard for this model. It is essential to verify that an aftermarket strap has exactly this width to ensure correct and stable attachment to the case lugs.

What strap material is recommended for the Day-Date 36 in yellow gold?

For the Day-Date 36 in yellow gold, the most appropriate materials are alligator (for formal elegance with geometric grain), vegetable-tanned calf (for patina development over time), shell cordovan (for mirror-like surface and durability), and cotton NATO (for daily versatility). The choice depends on use context and personal preference regarding leather maintenance.

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

Strap replacement requires a spring bar tool to remove the suspension pins from the case lugs. Position the tool in the pin groove, apply controlled pressure to compress the internal spring, withdraw the pin from the first lug, then repeat for the second lug. Proceed in reverse to install the new strap, ensuring the pins enter symmetrically into the case lugs.

Is an aftermarket strap compatible with the Rolex Day-Date 36 118388-0065?

Yes, provided the aftermarket strap has a lug width of 20 millimetres and sufficient length to wrap around your wrist. Bespoke leather straps offer advantages of aesthetic personalisation (leather choice, colour, texture) and ergonomic comfort, as they can be constructed calibrating curve and thickness to your specific wrist parameters.

What is the lifespan of a natural leather strap for this watch?

A quality natural leather strap (alligator, calf, shell cordovan) with vegetable tanning has an average lifespan of 3–5 years with daily use, varying based on frequency, climate, and maintenance. Natural leather ages progressively, developing scratches and patina. Regular maintenance (cleaning with a damp cloth, occasional treatment with natural balm) significantly extends strap longevity.

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