Rolex · Day-Date 36
Strap for Day-Date 36 Yellow Gold / Diamond / Champagne / President
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Day-Date 36 128348RBR-0026 (aka: M128348RBR-0026)
Selected for the 20 mm lug width · workshop selection
Matte Dark Gray Alligator Strap€195
Black Alligator Strap with Light Red Edging€149
Vintage Alligator Strap Cognac€195
Hammered Pink Strap with Ecru Stitching€98
Vintage Brown Calfskin Strap — Natural Patina€98
The Day-Date 36 128348RBR-0026 (aka: M128348RBR-0026), seen from the bench
Frequently asked questions
What is the lug width of the Rolex Day-Date 36 128348RBR-0026?
The lug width (distance between the two attachment pins) of the Rolex Day-Date 36 128348RBR-0026 is precisely 20 millimetres. This measurement is critical when selecting an aftermarket strap: even a 0.5mm deviation will cause improper fit, resulting in loose play or unwanted pressure on the case lugs.
Which strap suits the yellow gold Day-Date 36 best?
Alligator leather in dark brown or black is the hierarchically superior choice for the 128348RBR-0026 in yellow gold. The natural pattern of alligator skin harmonises elegantly with the champagne dial finish. Credible alternatives: shell cordovan for tactile density and subtle patina development; vegetable-tanned calf for sustainability without aesthetic compromise; vegetable-based rubber for summer versatility with precisely calibrated deployante clasp.
How do you change the strap on a Rolex Day-Date 36?
Changing the strap requires a spring bar tool (pinza a spillo). Locate the small aperture on one of the spring bar pins, compress the internal spring gently with the tool's tip, and extract the pin. Repeat for the second pin. Align the new strap's lug holes with the case lugs and re-insert both pins, ensuring the springs click into place. If inexperienced, entrust the operation to an authorised Rolex service centre or specialist craftsman.
Is an aftermarket strap truly compatible with the 128348RBR-0026?
Yes, provided it respects the 20mm lug width specification with a tolerance of ±0.2mm maximum. Quality manufacturers—Casati Milano, Hirsch, Barenia, and similar—produce 20mm lugs that conform to Rolex specifications. Always verify that the retailer guarantees precise manufacturing tolerances and that the clasp or deployante is dimensioned for the 36mm case diameter.
What is the typical lifespan of a leather strap on a Rolex Day-Date?
A quality leather strap (alligatore, shell cordovan, vegetable-tanned calf) maintains full functionality for 3 to 5 years under daily wear, with variation depending on frequency of use, ambient humidity, and maintenance. Vegetable-tanned leather ages more nobly and may exceed 5 years whilst developing attractive patina. Casati Milano offers an 18-month warranty on manufacturing defects. Recommendation: rotate between at least two straps to extend the longevity of each.
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

