Rolex · Day-Date 36

Strap for Day-Date 36 Yellow Gold - Baguette / MOP - Diamond / President

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
Reference128398TBR-0004 (aka: m128398tbr-0004)
FamilyDay-Date 36
MovementRolex caliber 3255 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

All Rolex spring barsOpen →

Straps for the Day-Date 36 128398TBR-0004 (aka: m128398tbr-0004)

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 128398TBR-0004 (aka: m128398tbr-0004), seen from the bench

The Day-Date 36 represents Rolex's flagship line of wristwatches with day and date indication. It is powered by the automatic Caliber 3255 with chronometer certification and displays hours, minutes, seconds, date, and day of the week. The case measures 36mm in diameter with 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 128398TBR-0004?

The lug width of the Rolex Day-Date 36 128398TBR-0004 is 20 millimetres. This measurement represents the distance between the two vertical lugs on the case where the spring bars connect. It is essential to verify this specification before purchasing an aftermarket strap to ensure perfect fit without lateral play.

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

For the Day-Date 36 128398TBR-0004 in yellow gold, we recommend alligator or calf leather straps in shades of chocolate brown, tobacco, cream beige, or ebony black. Alligator enhances the gold's luminosity through its fine, regular grain, whilst calf offers daily comfort and develops natural patina. Shell cordovan in burgundy represents a refined, durable choice for those seeking longevity.

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

The Day-Date 36 strap is changed by removing the spring bars using a spring bar tool. Place the watch on a soft surface, carefully insert the tool into the lower hole of the lug, compress the internal spring, and extract the pin. Repeat for both sides. Insert the new strap by aligning the holes and press the spring bars until they click into position. We recommend this operation with a specialist atelier to avoid scratches.

Can I use an aftermarket strap compatible with this Day-Date?

Yes, the Day-Date 36 128398TBR-0004 accepts any high-quality strap with a 20mm lug width. Artisanal straps in alligator, calf, vegetable-tanned leather, or shell cordovan provide an elegant alternative to the original Rolex, offering aesthetic customisation and often superior wrist comfort. Always verify that the attachment bars are compatible with your specific model.

How long does a leather strap last on this watch?

A quality leather strap (alligator or calf) typically lasts 3-5 years with daily wear, depending on exposure to moisture, direct sunlight, and perspiration. Shell cordovan, owing to its dense fibrous structure, can exceed 5-7 years. Regular maintenance—cleaning and annual conditioning with natural wax—significantly extends longevity. Deterioration is natural and imparts characteristic patina to the piece.

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