Quick answer
Reference 128239 is the Rolex Day-Date 36 in 18k white gold. Rolex lists it with caliber 3255, a 70-hour power reserve, a 36 mm case, and the President bracelet. Replica versions of 128239 differ from the original in four places: case metal, movement, weight, and dial print. A steel replica case is not gold. A clone movement is not caliber 3255. Check those four points before payment.
What the original 128239 is
- Case: 36 mm, 18k white gold, fluted or smooth bezel
- Movement: caliber 3255, automatic, 28,800 vph, 70-hour power reserve
- Day window at 12 o'clock, date at 3 o'clock under a Cyclops lens
- Crystal: sapphire with a laser-etched coronet at 6 o'clock
- Bracelet: President, three-piece links, concealed Crownclasp
- Water resistance: 100 m, per Rolex
- Dial options: several, including diamond-set and ombré
Sibling references share the case: 128238 is yellow gold, 128235 is Everose gold, 128236 is platinum.
Replica movements
Sellers name the SH3255, VR3255, and SA3255. These are copies of the 3255 architecture, not Rolex movements. Lower tiers use an ETA 2836 or Seagull ST21 with a bolted-on day and date module. The module adds case thickness, and the day wheel can flip at a different hour than the date.
Case metal and plating
316L steel covers most of the market. 904L steel appears at higher prices. Plated builds quote 3 to 5 microns of gold. That layer wears at the clasp, crown, and link edges. Some factories add a tungsten alloy core to raise the weight toward gold.
Weight
Rolex does not publish watch weight. Sellers quote numbers between 110 g and 160 g. A steel case sits at the low end. Tungsten builds sit higher. Weight alone does not prove gold, because a heavy steel or tungsten case reads close on a kitchen scale.
Dial, crystal, and bracelet
Check the day wheel font, the date font, and the alignment of each in its window. Check the coronet shape and print thickness. Diamond markers on replicas are cubic zirconia or lab-grown stones in most cases. Cyclops magnification on replicas lands near 2x; the original is 2.5x. Check end-link fit at the lugs and the clasp stamp inside the blade.
Water resistance
Replicas carry no pressure test data. Gaskets are not certified. Do not swim with any of them, and do not trust a 100 m claim printed on a replica caseback.
Price bands
- USD 150 to 300: 316L case, ETA-type movement with a day-date module
- USD 350 to 700: 904L case, clone 3255, gold plating, sapphire glass
- USD 700 to 1,200: tungsten-weighted case, thicker plating, tighter dial print
Legal note
Counterfeit watches are illegal to import into the United States. U.S. Customs and Border Protection seizes shipments at ports of entry. The OECD lists watches among the product classes with the highest counterfeit trade volume.
Checks before payment
- Ask for the movement name and a photo of the caseback.
- Ask for a scale photo with the bracelet sized to the worn length.
- Ask for plating thickness in microns.
- Ask for a photo of the day and date at the flip point.
- Ask for a return policy in writing.