Rolex · Day-Date 36

Strap for Day-Date 36 White Gold Diamonds / Oyster / MOP

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
Reference118389-0069
FamilyDay-Date 36
MovementRolex caliber 3155 Hours, Minutes, Seconds | Date, Day | Chronometer
CaseWhite Gold

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

All Rolex spring barsOpen →

Straps for the Day-Date 36 118389-0069

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Day-Date 36 118389-0069, seen from the bench

The Day-Date 36 represents the classic version of the Rolex timepiece dedicated to the complete display of the date. It features the automatic 3155 caliber with chronometer certification and dual day-date indication in addition to the hours, minutes and seconds functions. The case has 20mm lugs and maintains the traditional proportions of the model.

Frequently asked questions

What is the lug width for the Rolex Day-Date 36 118389-0069?

The lug width of the Rolex Day-Date 36 118389-0069 is 20mm. This measurement is standard across all Day-Date 36 models and is determined by the internal distance between the two lugs on the case. It is essential to verify this specification before ordering an aftermarket strap, as 18mm straps will be loose and 22mm straps will not fit.

Which strap is best suited for the Rolex Day-Date 36 118389-0069 in white gold?

For a white gold Day-Date 36, Nile crocodile alligator in dark brown or cognac tones represents the most refined choice. Shell cordovan is a noble alternative for those who appreciate a patina that develops over time. Vegetable-tanned calf leather offers an excellent aesthetic balance at more accessible price points. For daily wear, a polyamide NATO or FKM rubber strap provides superior durability.

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

Strap replacement requires a spring bar remover tool. Place the watch in a protective holder, insert the spring bar remover under the tension spring of the lug, apply gentle pressure to release the metal pin, and carefully extract the old strap. Reverse the process to install the new strap. If you lack the correct tool, it is advisable to visit an authorised service centre to avoid case damage.

Is an aftermarket strap compatible with the Rolex Day-Date 36 118389-0069?

Yes, any strap with a 20mm lug width is compatible with the 118389-0069, provided the thickness does not exceed 5.0mm (the limit imposed by the lugs). Bespoke leather, synthetic and fabric straps designed for this size fit perfectly. Always verify technical specifications with the manufacturer to ensure structural compatibility and adherence to Rolex standards.

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

The durability of a leather strap depends on the material and usage patterns. Premium quality Nile crocodile leather, vegetable-tanned and handcrafted, typically lasts 4-6 years of intensive wear before showing significant structural signs of wear. Shell cordovan tends to last longer due to fibre density. Factors such as humidity, direct sunlight exposure and frequency of wear significantly influence longevity. Periodic maintenance—gentle cleaning and conditioning—can extend lifespan to 8-10 years.

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