Rolex · Day-Date 36

Strap for Day-Date 36 Platinum - Fluted / MOP / 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
Reference128236-0002
FamilyDay-Date 36
MovementRolex caliber 3255 Hours, Minutes, Seconds | Date, Day | Chronometer
CasePlatinum

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 128236-0002

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 128236-0002, seen from the bench

The Day-Date was introduced in 1955 as the first wristwatch to display the day and date in full. It is powered by the automatic Calibre 3255 with official chronometer certification and indicates hours, minutes, seconds, date and day. 20mm lug size for the strap.

Frequently asked questions

What is the exact lug width of the Rolex Day-Date 36 128236-0002?

The lug width (ansa width) of the Rolex Day-Date 36 128236-0002 is precisely 20 millimetres. This measurement ensures the strap attaches correctly to the case lugs via spring bars. You can verify this by measuring the distance between the lateral lugs on the case.

Which strap materials are most suitable for this platinum model?

The 128236-0002 in platinum pairs beautifully with alligator (preferably dark brown or black), shell cordovan from vegetable tanneries (which develops natural patina), smooth calfskin in pearl grey or bordeaux tones, and optionally a buttero rubber for informal wear. Alligator remains the classic choice to maintain visual balance between case and strap.

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

To change the strap, use a dedicated spring bar tool to carefully disconnect the bars from the lugs, remove the worn strap, and insert the new one by aligning the holes with the pins. If you lack experience, we recommend having a professional jeweller or Casati Milano atelier handle the swap to prevent damage to the case.

Is a 20mm aftermarket strap compatible with the Day-Date 36 128236-0002?

Yes, any quality strap with a precise 20mm lug width is compatible with the Day-Date 36 128236-0002. What matters is exact sizing and proper alignment of the spring bar holes. Milanostraps.it offers a dedicated collection of 20mm artisanal Italian-made straps.

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

A naturally-tanned vegetable-leather strap typically lasts 3–5 years with moderate daily wear, provided it is properly maintained and protected from excessive moisture. Alligator tends to last longer due to denser structure, whilst cordovan ages with character over time. Casati Milano guarantees 18 months against manufacturing defects, though final durability depends on lifestyle and care habits.

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