Name: Rolex Day-Date 40 228238
Brand: Rolex
SKU: 228238

The Day-Date 40 228238 is the current production yellow gold Day-Date, stretched to 40mm with Rolex's in-house caliber 3255 and the President bracelet as standard equipment. It occupies the top of the Oyster Perpetual family, built entirely in 18k gold, and trades on dial variety more than any other Rolex reference.

What it is

Rolex introduced the 228238 in 2015 as a direct replacement for the 118238, enlarging the case from 36mm to 40mm and fitting the then-new caliber 3255. The reference launched with an expanded dial palette that now spans meteorite, onyx, malachite, and other stone dials alongside sunburst lacquer and champagne options. No significant case or movement revision has followed since launch; the reference remains in active production.

Buying notes

Check the dial origin carefully: stone and meteorite dials are cut individually and no two are alike, so comparison photos from the seller are essential before purchase. The President bracelet should have a concealed-folding Crownclasp with the reference number stamped inside; mismatched or replacement bracelets are common on pre-owned examples. Inspect the case for polishing, particularly the lugs and the fluted bezel flanks, where rounding removes the crisp geometry.

Prefer examples with the original Rolex service pouch or card confirming factory-authorized work if the watch has been opened.

Market read

Meteorite and semi-precious stone dials (malachite, onyx, aventurine) consistently carry a premium of 10-25% over standard lacquer dials in the secondary market. Full-set examples with original box, papers, and unworn President bracelet push meaningfully above watch-only pricing. The reference trades at or near retail for common dials; rarer configurations are thin-traded enough that realized prices vary widely depending on the platform and buyer pool.

Service expectations

Caliber 3255 is Rolex's current-generation movement, rated to a 70-hour power reserve with improved shock and magnetic resistance over its predecessor. Service intervals are generally 10 years per Rolex's own guidance, and authorized service costs for an all-gold reference are substantial, typically $1,500 or more depending on parts needed. A documented recent service adds credibility on resale but does not command the same dollar-for-dollar return it does on sport references.

Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.

Mass-produced#1 in familyOfficial press photos

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In-house manufacture caliber · caliber Rolex Cal. 3255: in-house automatic with day and date, 28,800bph, 70h PR, 31j; Chronergy escapement, Parachrom hairspring; used in Day-Date 40 · 70h power reserve (2.9 days)

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The President model in yellow gold; the day disc language and President bracelet hidden clasp are the two highest-value authenticity checks.

Known issues in the market

Day disc language mismatch; Rolex Day-Date dials are ordered with specific day languages, and swapped discs from different configurations are common on the secondary market.
President bracelet with incorrect link finishing; genuine President links have a specific curved profile and factory finish that aftermarket copies fail to replicate.
Cal. 3255 Chronergy escapement details; movement fakes are rare but service records should document Rolex or authorized watchmaker service only.

Area	What to check	What is correct	Red flag
dial	Day disc text and printing quality	Day spelled in full in the correct language; text is crisp with consistent weight; disc background matches the dial color family	Abbreviated day text; mixed language discs; printing that looks blurred or inconsistent with factory standards
bracelet	President bracelet link profile and hidden clasp	Three-piece semi-circular links with correct curve radius; hidden Crownclasp invisible when closed; 750 hallmarks on clasp interior	Links that appear flat rather than curved; visible clasp gap when bracelet is closed; missing or incorrect hallmarks
case	18k yellow gold case with fluted bezel	Deep fluting on the 18k yellow gold bezel; crown shoulders matching case profile; all surfaces show appropriate gold coloring without wear through to base metal	Gold plate wearing through to reveal steel or different base metal; fluting that is too shallow or uneven
movement	Cal. 3255 Chronergy escapement	Cal. 3255 visible through exhibition caseback if present; Chronergy escapement with nickel-phosphorus lever and escape wheel; 70-hour power reserve	Older Cal. 3155 or non-Rolex movement in a purported 228238; any movement without Rolex-signed rotor
dial	Applied gold indices and printing	Applied 18k yellow gold hour markers; "DAY-DATE" text at the 6 o'clock position; dial printing matching original configuration	Applied markers that show different gold tone than case; dial printing that includes elements inconsistent with 228238 configuration

Common legitimate replacements

President bracelets are frequently replaced or have links removed; original complete bracelet with clasp is required for full market value.
Dials are the most valuable single component and are swapped to create exotic or high-demand configurations; verify dial matches original order documentation.
Day discs are replaced to change language; original language configuration should match accompanying paperwork.

Expert resources: RolexForums.com Day-Date subforum for 228238 reference examples. Rolex serial database confirms production year. President bracelet authentication guide on WatchUSeek. Rolex Day-Date collector guides for day disc language configurations.

Authentication guide

Last reviewed June 2026

The 228238 is the current Day-Date 40 in 18ct yellow gold on a President bracelet, powered by Cal. 3255. Day-Date references exist only in precious metal; any steel example is misrepresented. The dial variety for this reference is enormous, from plain to meteorite to gem-set.

Known reproduction risks

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HIGH RISK

Steel or base-metal Day-Date cases

A magnet test reveals ferrous content in the case or bracelet; genuine 18ct yellow gold is non-magnetic
Case color that looks plated -- thin yellow over a lighter base -- will show wear at lug edges and bracelet pin holes
Weight: a genuine 228238 on President bracelet is significantly heavier than a plated or base-metal equivalent

The Day-Date has never been produced in steel. Any steel Day-Date is a modified or non-original example.

MEDIUM

Aftermarket dial substitution on genuine gold cases

Aftermarket dials often show incorrect text hierarchy or font differences from the genuine Rolex dial
Cyclops lens on aftermarket dials may show a different magnification or refractive quality
Day and date wheel text that does not match known factory configurations

Dial variants by era

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Era	Description	Identifiers
2015 to present (standard dials)	Available in dozens of dial options including champagne, silver, chocolate, and sunburst lacquer. All share applied yellow gold indexes and the day wheel at 12 o'clock in a cutout aperture.	Day window at 12 o'clock with full day name in selected language Date window at 3 o'clock with Cyclops lens Applied yellow gold baton indexes on most variants President bracelet in yellow gold with concealed clasp
2015 to present (exotic dials)	Meteorite, onyx, malachite, wood, and gem-set dials. Each uses the same case and bracelet as standard variants.	Meteorite dials show natural Widmanstatten pattern (no two are identical) Semi-precious stone dials (onyx, malachite) have visible mineral structure Gem-set bezels and dials are accompanied by a Rolex gem certificate for original retail sale

Service part flags

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President bracelet

Original: Three-piece semi-circular link design in solid 18ct yellow gold. The concealed clasp opens with a push-button mechanism and is flush when closed. The President bracelet is exclusive to the Day-Date family across the entire Rolex catalog. No production Rolex other than the Day-Date uses the President bracelet from the factory. Any watch on an Oyster or Jubilee bracelet presented as a Day-Date has had the bracelet changed.

Replacement tells

Bracelet that feels noticeably lighter than expected for solid gold construction
Links that appear hollow when viewed from the end cut
Clasp that shows the opening mechanism when closed (should be hidden)
Any bracelet that is not in yellow gold to match the case; mixed-metal Presidents do not exist from the factory on 228238
Oyster or Jubilee bracelet presented as an original Day-Date configuration -- the Day-Date has never shipped on these bracelets from Rolex

Dial

Original: Original dials carry the Rolex crown hallmark, "Day-Date" model text, and "OYSTER PERPETUAL" with the full superlative text. The day wheel is factory-matched to the dial language.

Replacement tells

Day wheel language that does not match the listed reference configuration
Aftermarket dials with incorrect text spacing or font weight for this generation
Cyclops lens that magnifies the date incorrectly (should be 2.5x)
Applied indexes that sit at incorrect angles or heights relative to the dial surface

Case back markings

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2015 to present

Solid yellow gold caseback -- no exhibition window
Engraved: ROLEX OYSTER PERPETUAL DAY-DATE
Rolex crown engraved at center
Reference 228238 and serial between the lugs

Movement tells

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Cal. 3255 is the correct movement; it uses the Chronergy escapement, Syloxi hairspring, and achieves the COSC+Rolex Superlative Chronometer standard. Service documentation noting Cal. 3155 means the movement has been replaced with the prior generation.
Power reserve is approximately 70 hours. A movement running down in under 48 hours needs service or has a mainspring issue.
The oscillating weight bears the Rolex crown and is in 18ct yellow gold to match the case.

Sources: Rolex Day-Date product page; RolexForums -- Day-Date 40 reference thread; Antiquorum -- Day-Date auction catalog notes.