Rolex · Day-Date 36

Strap for Day-Date 36 White Gold / Diamond / Paved-Rainbow / President-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
Reference128349RBR-0012
FamilyDay-Date 36
MovementRolex caliber 3255 hours, minutes, seconds | date, day | chronometer
Year2019
CaseWhite Gold

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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 128349RBR-0012

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 128349RBR-0012, seen from the bench

The Day-Date 36 features the Rolex 3255 automatic caliber with official chronometer certification. It has hours, minutes, seconds, date and day of the week indication. The case presents 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 128349RBR-0012?

The Rolex Day-Date 36 128349RBR-0012 features a lug width of 20 millimetres. This measurement is specific to the 36mm model and results from precise ergonomic proportions engineered by Rolex to ensure visual balance and wrist comfort. To verify compatibility, measure the distance between the two lug holes on the case: this measurement in millimetres corresponds to the correct strap width.

What is the best strap material for the Rolex Day-Date 36 128349RBR-0012 in white gold?

For the Day-Date 36 in white gold with baguette diamonds, alligator in black or dark brown tones is the classic aesthetic choice: the geometric grain reflects the luminosity of white gold, creating visual continuity. Shell cordovan in dark tones is ideal for those seeking a patina that evolves over time and superior wear resistance. Vegetable-tanned calf leather offers immediate suppleness and a natural ageing process that personalises the watch.

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

Remove the strap using a spring bar tool: insert the flat end into the lug hole and apply gentle upward pressure to release the pin, then slide the strap from the case. To install a new strap, align the holes with the lugs and press gently until you hear a click. If you lack the tool or prefer to avoid the risk of scratching, Casati Milano offers strap replacement service with WhatsApp guidance.

Can I use a third-party aftermarket strap on the Day-Date 36 128349RBR-0012?

Yes, the Day-Date 36 128349RBR-0012 is compatible with quality third-party straps of 20mm width. However, it is essential that the strap is constructed from premium leather (alligator, shell cordovan, calf) with precise finishing: inferior quality compromises the watch's elegance. Casati Milano supplies bespoke artisanal straps specifically designed for the Day-Date, with white gold deployant clasp if desired.

How long does a leather strap last on a daily-worn Rolex Day-Date?

A premium leather strap (alligator, shell cordovan, calf) with artisanal construction has an average lifespan of 3–5 years with daily wear, provided it receives periodic maintenance: gentle cleaning and conditioning every 6–12 months. Shell cordovan tends to last longer (5–7 years) due to natural fibre density. Alligator in controlled environments (protection from excessive moisture) can exceed 5 years. Casati Milano's 18-month warranty on manufacturing defects covers construction imperfections.

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