Short answer
The Rolex Day-Date reference 118235 is a 36 mm watch in 18k Everose gold. Rolex built it from about 2000 to 2019, when reference 128235 replaced it. A "replica" of the 118235 is a counterfeit. Rolex does not make it, no Rolex warranty covers it, and selling one in the United States carries federal criminal penalties.
Genuine specs of the 118235
- Case: 36 mm, 18k Everose gold, screw-down Twinlock crown
- Bezel: fluted or smooth, depending on the version
- Crystal: sapphire with a Cyclops lens over the date
- Movement: Rolex cal. 3155, automatic, 48-hour power reserve, COSC certified
- Water resistance: 100 m (330 ft)
- Bracelet: President, three-piece links, concealed Crownclasp
- Day window at 12 o'clock in 26 languages, date window at 3 o'clock
- Reference code metal: last digit 8 is yellow gold, 9 white gold, 5 Everose gold, 6 platinum
What counterfeit sellers advertise
Listing text for a fake 118235 names gold plating, a "Swiss ETA clone," and 1:1 case size. The cases are brass or 316L steel with a gold layer measured in microns. Rolex uses solid 18k gold for the case and the bracelet. The metal weight of the real watch is a large part of what it is worth, and plated metal does not hold that value. Wear shows at the crown, the lugs, and the clasp.
Checks that separate a fake from a real 118235
- Caseback. Every Rolex Day-Date 118235 has a solid caseback. A display back on a "118235" proves the watch is a counterfeit.
- Weight. Solid 18k gold has a density near 15 g/cm3. A plated steel case feels light in the hand.
- Hallmarks. Look for the 750 stamp and the Rolex crown on the caseback, the lugs, and the clasp.
- Movement. The genuine caliber 3155 has 31 jewels, runs at 28,800 vph, and shows Geneva stripes, circular graining, and polished screw heads. Fakes use unfinished clone movements, plastic movement rings, or glued-in rotors.
- Crystal. A laser-etched coronet sits at 6 o'clock on the sapphire. A 10x loupe shows it. Copies miss the shape or leave it out.
- Serial and reference. The serial and the 6-digit reference sit between the lugs, at 12 o'clock and 6 o'clock. Engraving on fakes is shallow or in the wrong font.
- Day and date discs. Fonts, spacing, and the 26-language day wheel match only on genuine parts.
Legal position in the United States
18 U.S.C. 2320 makes trafficking in counterfeit goods a federal crime. A first offense carries up to 10 years in prison and a fine. US Customs and Border Protection seizes counterfeit watches at ports of entry, and the importer loses the goods. Rolex owns trademark registrations for the name, the crown, the dial layout, and the President bracelet. Personal possession is a state matter that varies. Selling, importing, or reselling a fake 118235 exposes the seller to criminal charges and civil suits from Rolex. This is general information, not legal advice.
Service and resale
Rolex service centers refuse counterfeit watches. The watch comes back with no work done. Auction houses, dealers, and trade platforms reject fakes, so the resale value is near the scrap value of the plated metal. A real 118235 holds value because the case and bracelet are solid gold. Prices for genuine examples move with dial type, year, condition, and the gold market. Check recent auction results before you set a budget.
Questions buyers ask
Is a replica 118235 made of real gold?
No. The common build is a brass or steel case with a gold layer 3 to 5 microns thick. Claims of "18k wrapped" or "gold filled" do not mean solid gold.
Can a jeweler tell?
Yes. An acid test, X-ray fluorescence, a timing machine, and a loupe answer the question in minutes. Weight and movement finish settle most cases.
Does a fake keep time?
Some clone movements run well for a while. Parts, lubrication, and adjustment differ from Rolex spec, and no watchmaker stocks spares for them. Repair cost can pass the price of the watch.