Rolex · Day-Date 36
Strap for Day-Date 36 White Gold - Baguette / Silver / 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 128399TBR-0001
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 128399TBR-0001, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Day-Date 36 128399TBR-0001?
The Rolex Day-Date 36 128399TBR-0001 features a lug width of exactly 20mm. This width is specific to this model and is measured between the two lateral lugs of the case. A 20mm strap guarantees precise insertion without excessive play or force.
Which strap material is most suitable for the white gold Day-Date 36?
Alligator leather with vegetable tanning is the most authoritative choice for the Day-Date 36 128399TBR-0001: its natural texture dialogues perfectly with the squared geometry of the white gold case. Shell cordovan offers a noble patina that ages gracefully over time. Box calf represents an elegant and sober compromise.
How do you change the strap on a Rolex Day-Date 36?
Changing the strap on a Rolex requires specific tools (spring bar tool or precision screwdriver) and a clean work surface. Each lug is secured with a spring bar: carefully remove the bar from the underside of the case, extract the old strap, and insert the new one ensuring the bar is firmly seated. Alternatively, Casati Milano offers a complete service with personalised guidance.
Which aftermarket straps are compatible with the 128399TBR-0001?
Any strap specifically manufactured for 20mm lug width is compatible with the Day-Date 36 128399TBR-0001, regardless of brand. Milano Straps offers a comprehensive collection of 20mm straps in alligator, cordovan, calf, and other materials certified for compatibility with Rolex models.
How long does a leather strap last on a daily-worn Rolex?
A quality leather strap, artisanally crafted with vegetable tanning, has an average lifespan of 3-5 years with daily wear. Shell cordovan tends to last longer due to the density of the material. Visible wear (fading, patina development) is aesthetic and adds character; structural wear (tears, thinning) is the true indicator for replacement. Casati Milano provides an 18-month guarantee against manufacturing defects.
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

