Rolex · Day-Date 36
Strap for Day-Date 36 Yellow Gold Diamonds / President / Meteorite
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 118388-0020
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 118388-0020, seen from the bench
Frequently asked questions
What is the lug width of the Rolex Day-Date 36 reference 118388-0020?
The Day-Date 36 reference 118388-0020 features a 20-millimetre lug width. This measurement is standard across all President models in the 36mm diameter range, regardless of case material (yellow gold, white gold, Everosé or platinum). Verification of lug width is essential before purchasing an aftermarket strap: placing a digital calliper between the two holes on the case lugs will provide the precise reading of 20mm.
What is the best strap for the Rolex Day-Date 36 118388-0020?
There is no universally 'best' strap, rather selections determined by intended use and personal aesthetics. For a President in yellow gold, alligator in havana or cognac represents the traditional choice: exotic leather that dialogues naturally with warm metal. Italian calf with vegetable tanning is the contemporary option, offering greater softness and versatility. Shell cordovan suits purists seeking mechanical resistance and rapid patina development. Black calf or anthracite alligator creates elegant contrast for formal contexts. The selection depends on intended use: daily wear, occasional or collection-based rotation.
How do I change the strap on my Day-Date 118388-0020?
Strap replacement requires an appropriate strap removal tool (instrument with two refined tips). Position the watch on a soft cloth, gently press the removal tool against the spring bars that retain the strap, pushing from one side until they slide free. On the opposite side, repeat the procedure. Once the spring bars are removed, extract the exhausted strap and insert the replacement. Reinsert the spring bars with care: the strap must seat without lateral play. If uncertain, consult a certified watchmaker to prevent damage to the bars or lugs.
Is an aftermarket strap compatible with the Rolex Day-Date 36 reference 118388-0020?
Yes, provided it is dimensioned to 20 millimetres lug width. All certified straps for this measurement will install without modification on the case. Verify that the supplier explicitly specifies '20mm lug width' in the product description. At milanostraps.it an extensive collection of 20mm artisanal straps is available in alligator, calf, shell cordovan and natural rubber, all compatible with the 118388-0020 and customisable to the wearer's wrist size.
What is the average lifespan of a leather strap for the Day-Date?
A premium leather strap used daily exhibits a lifespan of 3–5 years before significant wear becomes apparent (thinning, micro-cracking, intense discolouration). Alligator typically outlasts calf: the structure of natural scales imparts superior mechanical resistance. With vegetable tanning, calf softens more rapidly but develops more captivating patina. Shell cordovan, if exposed to regular sunlight, ages magnificently yet requires conditioning with specific creams every 6–12 months. Storing straps away from direct light and humid environments extends the average lifespan by at least 18–24 months.
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

