Rolex · Day-Date 40
Strap for Day-Date 40 Platinum - Baguette / Black
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 40 228396tbr-0024
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 40 228396tbr-0024, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Day-Date 40 228396tbr-0024?
The Rolex Day-Date 40, reference 228396tbr-0024, features a lug width of 20 millimetres. This dimension must be measured precisely between the internal attachment pins of the case. It is essential to verify that the chosen strap explicitly indicates 20mm as the width, as even minor variations affect fitment and case compatibility.
Which strap is most suitable for the Rolex Day-Date 40 228396tbr-0024 in platinum?
For the 228396tbr-0024 in platinum, we recommend alligator in warm brown tones (cognac, chocolate, dark brown) which creates elegant contrast with the cold metal of the case. Alternatively, shell cordovan with natural patina offers superior durability and beauty that improves over time. Vegetable-tanned calf represents a balanced choice between formality and comfort, maintaining a refined and understated appearance.
How do you change the strap on a Rolex Day-Date 40?
Strap replacement requires a specific tool called a spring bar tool. Position the watch on a stable surface, insert the tool into the small slot next to the attachment pin, apply gentle pressure to release the internal spring, and slide out the old strap. Next, align the new strap beneath the pin and push gently until it clicks into place. If you are inexperienced, entrust the task to a professional watchmaker to avoid damage to the case.
Is an aftermarket strap compatible with the Rolex Day-Date 40 228396tbr-0024?
Yes, any strap with a 20mm lug width is compatible with the 228396tbr-0024, regardless of manufacturer. However, to ensure maximum quality and durability in line with Rolex standards, we recommend selecting artisanal strap makers who use premium leathers and refined finishes. Always verify that the width is certified exactly at 20mm.
What is the average lifespan of a leather strap on a Rolex Day-Date 40?
A premium leather strap (alligator, shell cordovan, vegetable-tanned calf) on a regularly worn timepiece typically lasts 3-5 years before replacement is necessary. Lifespan depends on sun exposure, humidity, frequency of use, and leather quality. Straps made with vegetable-tanned leathers age more elegantly, developing natural patina that enhances appearance over time. Periodic maintenance (gentle cleaning with a damp cloth) extends the useful life of the strap.
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

