Rolex · Day-Date II

Strap for Day-Date II Platinum Ice Blue Roman

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter41 mm
Reference218206-0043
FamilyDay-Date II
MovementRolex caliber 3156 hours, minutes, seconds | date, day | chronometer
Year2008 - 2015
CasePlatinum

Recommended spring bar

Spring bars Rolex Day-Date 40 — 21mm × 1.5mm

Technical match for lug width and diameter · lug 21 mm · Ø 1.5 mm

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Straps for the Day-Date II 218206-0043

Selected for the 21 mm lug width · workshop selection

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The Day-Date II 218206-0043, seen from the bench

The Day-Date II represents the evolution of the classic Rolex Day-Date with an enlarged case. It mounts the automatic 3156 caliber certified chronometer with indication of hours, minutes, seconds, date and day of the week. The case features 21mm lugs and uses precious materials typical of the Day-Date collection.

Frequently asked questions

What is the lug width of the Rolex Day-Date II 218206-0043?

The lug width of the Rolex Day-Date II 218206-0043 is precisely 21 millimetres. This measurement is specific to the 41 mm platinum case and designed to ensure both aesthetic proportion and structural integrity. To measure accurately, position a digital calliper between the two protruding lugs perpendicular to the movement.

What strap material is recommended for the Day-Date II 218206-0043 in platinum?

For the 218206-0043, alligator leather with vegetable tanning is the most suitable material: its regular scales and naturally developing patina harmonise perfectly with the nobility of platinum. Shell cordovan represents an excellent alternative for those seeking a mirror-like patina over time. Avoid calf leather for watches of this significance, as it is less resilient over the medium to long term.

How do I change the strap on my Rolex Day-Date II 218206-0043?

Strap replacement on a watch of this importance should be entrusted to a specialised watchmaker. Never remove the lugs manually, as the risk of damaging the platinum spring bars is considerable. The operation requires specific tools (lug holder, spring bar remover with precision mechanism) and calibrated procedure: contact an authorised Rolex service centre or a specialised artisan.

Can I use an aftermarket strap compatible with the Rolex Day-Date II 218206-0043?

Yes, provided the strap is crafted by an artisan with proven experience on luxury watches. The 21 mm lug width must be respected with millimetre precision. Avoid mass-produced straps: the attachment platform and lugs must fit the integrated platinum spring bars without creating slack or mechanical stress.

How long does a leather strap last on a watch like the 218206-0043?

A strap in alligator or shell cordovan, crafted by specialised artisans with vegetable tanning and manual finishing, typically lasts 5–8 years with daily wear and careful maintenance. Longevity depends on environmental factors (humidity, perspiration, sun exposure) and frequency of wear. Periodic maintenance—gentle cleaning and conditioning with natural oils—significantly extends the strap's 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.

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