Rolex · Day-Date 36

Strap for Day-Date 36 Yellow Gold Diamonds / Oyster / Green Jade Carousel

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
Reference118348-0181
FamilyDay-Date 36
MovementRolex caliber 3155 Hours, Minutes, Seconds | Date, Day | Chronometer
CaseYellow 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

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Straps for the Day-Date 36 118348-0181

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118348-0181, seen from the bench

The Day-Date 36 represents the classic version of the Rolex collection with day and date indication. It is equipped with the automatic caliber 3155 with chronometer certification and display of hours, minutes, seconds, date and day of the week. The 36mm case features standard 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Day-Date 36 118348-0181?

The lug width of the Day-Date 36 118348-0181 is precisely 20 millimetres. This width is a fixed construction specification of the case and determines the interface between the case and the strap. To verify compatibility, measure the space between the lugs using a digital calliper, positioned perpendicularly to the case body, without applying pressure.

What is the best strap for the Rolex Day-Date 36 118348-0181?

American alligator with vegetable tanning represents the formal choice recommended, thanks to the regular grain pattern and the patina that evolves over time. For versatile contexts, top-grade calf leather offers a balance between elegance and daily wearability. Both materials in deep cognac or black tones guarantee optimal matching with the 18-carat yellow gold case.

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

The process requires extraction of the spring bars. Use a specialised tool (spring bar tool) to compress the two small pins at the extremities of each lug, release the tension and slide the lug inward towards the case. Once both lugs are free, remove the old strap and insert the new one, verifying that the spring bar pins click into stable position. For precision and safety, this intervention can be entrusted to an authorised service centre.

Is an aftermarket 20mm strap compatible with the 118348-0181?

Yes, provided that the strap is constructed with dimensional tolerance within ±0.3 millimetres and that the spring bars are of identical length and rigidity to the originals. Artisanal straps manufactured to excellence standards guarantee compatibility. Always verify with the maker the specific conformance to reference 118348-0181 before purchase.

What is the lifespan of a leather strap for a Rolex Day-Date 36?

A top-quality artisanal alligator or calf leather strap, subject to regular use and correct maintenance (clean with soft cloth, protect from excessive humidity), maintains structural integrity for 5-7 years. Lifespan varies according to intensity of use, climate and care. Periodic conditioning with specialised creams extends useful life. With Casati Milano, each strap is guaranteed for 18 months against manufacturing defects, with the possibility of professional restoration beyond the warranty period.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only