Rolex · Day-Date 36

Strap for Day-Date 36 Everose Domed / President / Black 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
Reference118205f-0005
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

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Straps for the Day-Date 36 118205f-0005

Selected for the 20 mm lug width · workshop selection

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The Day-Date 36 118205f-0005, seen from the bench

The Day-Date was introduced by Rolex in 1956 as the first wrist watch to display the day of the week and the date automatically. It features the automatic Caliber 3155 with chronometer certification and indication of hours, minutes, seconds, date and day of the week. The 36mm case features 20mm lugs.

Frequently asked questions

What lug width does the Rolex Day-Date 36 reference 118205f-0005 require?

The Rolex Day-Date 36 reference 118205f-0005 features a 20 mm lug width, measured from the centre of one attachment pin to the centre of the opposite pin. This dimension is standard across all Day-Date models with a 36 mm case and Twinlock crown, and it is essential for purchasing compatible straps.

Which strap material suits a rose gold Day-Date 36 best?

For a rose gold Day-Date 36, we recommend alligator leather in brown shades, calf leather in cognac or black tones, or shell cordovan. Alligator emphasises formal elegance through its natural grain texture; calf offers suppleness and chromatic versatility; cordovan, for those accepting pronounced patina, ensures structural resilience. Avoid heavily textured materials (nappa, rubber) that visually conflict with the jewellery-like character of the case.

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

Strap replacement requires removal of the attachment pins using a dedicated springbar tool. Position the watch on a soft surface with the lug side facing upward, insert the flat end of the springbar tool into the small hole beneath the pin, apply gentle pressure to compress the internal spring, and slide the pin out of the case. Reverse the procedure to install the new strap. Never use screwdrivers or improvised objects, as the risk of scratching the case back is considerable.

Is an aftermarket 20 mm strap compatible with the 118205f-0005?

Yes, any strap featuring a 20 mm lug width is mountable on the Day-Date 36. Compatibility is guaranteed by Rolex's standardised attachment ring dimensions. However, we recommend straps constructed with proportionate lugs (neither too tight nor excessively loose) and materials of artisanal quality: a rose gold case deserves a leather base that replicates that longevity.

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

Durability depends on the material chosen, frequency of wear, and environmental exposure. High-quality alligator leather, under normal wearing conditions, retains structural integrity between 3 and 5 years; calf leather between 2 and 4 years; cordovan, if kept dry, can exceed 6 years. Patina (surface creasing) is a natural process that does not compromise function but renders the strap progressively softer and uniquely personal over time.

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