Rolex · Day-Date 36

Strap for Day-Date 36 Everose Domed / Oyster / Chocolate

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
Reference118205f-0127
FamilyDay-Date 36
MovementRolex caliber 3155 hours, minutes, seconds | date, day | chronometer
CaseRose 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 118205f-0127

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Day-Date 36 118205f-0127, seen from the bench

The Rolex Day-Date 36 ref. 118205f-0127 is the original automatic dress watch with dual calendar complication, launched in 1956. This 36mm Everose gold case houses the automatic chronometric caliber 3155, offering 48-hour power reserve and COSC precision. The 20mm lug width is the precise specification for this reference. The Day-Date defined the aesthetic standard for generations and remains a discrete, perfectly proportioned instrument for professionals and gentlemen.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118205f-0127?

The Rolex Day-Date 36 118205f-0127 features a lug width of exactly 20 millimetres. This measurement is the precise distance between the two lugs where the strap attaches to the case. To verify this dimension, measure the free space between the two lugs using a digital calliper or precision ruler.

Which strap is best suited for the Rolex Day-Date 36 118205f-0127?

For the Day-Date 36 in rose gold, alligator leather represents the classical choice: vivid texture, stable grain pattern, and restrained patina development over time. Calf leather offers a softer alternative and permits more dynamic colour evolution. For casual applications, high-quality fabric NATO straps provide practicality without aesthetic compromise. Vegetable-tanned leather remains ideal if you desire a strap that ages naturally alongside the watch.

How do I change the strap on the Rolex Day-Date 36 118205f-0127?

Strap replacement requires extraction of the spring bars from the lugs using a dedicated tool. Position the watch on a soft pad, use a spring bar tool to compress the bar slightly and slide it out from the lug. Insert the new strap by manipulating the spring bar from both ends symmetrically. If unfamiliar with the procedure, entrust the task to a qualified watchmaker: the risk of casing scratches is genuine.

Can I use an aftermarket strap on this Rolex model?

Absolutely. Any strap with a 20mm lug width is mechanically compatible. The real difference lies in construction quality: a premium aftermarket strap (genuine alligator, mass-dyed leather, precise stitching) is in no way inferior to original Rolex products; often it offers greater attention to detail and more interesting patina development.

How long does a leather strap last on a Rolex Day-Date like the 118205f-0127?

Durability depends upon material type, usage pattern, and maintenance discipline. High-quality alligator endures 7-10 years with moderate daily wear. Calf leather tends to yield more rapidly (4-7 years), particularly at the lug attachment zone where the leather experiences maximum stress. Vegetable-tanned leather, whilst more durable, visibly ages more quickly, creating a desired vintage effect. Periodic cleaning and drying after moisture exposure significantly extend strap lifespan.

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