Short answer
Reference 128347 does not appear in Rolex's published Day-Date catalog. Listings that use the number are replica factory codes, not Rolex references. A watch sold as a "Day-Date 128347" is a counterfeit. It comes with no Rolex warranty, no Rolex service, and no gold content unless a jeweler tests it. In the US, trafficking in that watch is a federal crime under 18 U.S.C. § 2320.
What the real Day-Date is
Specs that hold across the current Day-Date line:
- Day aperture at 12 o'clock with the full day name, date at 3 o'clock.
- Caliber 3255, automatic, 70-hour power reserve, rated -2/+2 seconds per day.
- Water resistance to 100 m.
- Precious metal case only: 18 kt yellow, white, or Everose gold, or platinum.
- President bracelet with a concealed Crownclasp.
Retail for a gold Day-Date 36 starts above $35,000 and climbs with diamond bezels and dials.
Where the number 128347 comes from
Replica factories assign codes that sit one digit away from real Rolex references. Some map to a real catalog entry. Others, 128347 included, match nothing. The code lets a dealer quote a spec sheet: case size, bezel type, dial color, bracelet style. Treat any number you cannot match on Rolex's own site as a factory code.
Build tiers sellers describe
- Entry: 316L steel case with gold plating, Asian 2836-2 clone, printed dial.
- Mid: plating claimed at 5 to 10 microns, sapphire crystal with date magnifier, better bracelet end links.
- Top: "clone 3255" movement, 904L steel claim, decorated bridges.
These are claims, not specs. Plating wears at the clasp and crown within months of daily wear. A "3255 clone" is a modified Asian movement with a decorative plate. No watchmaker orders Rolex parts for it.
Weight tells you about the metal
An 18 kt gold Day-Date 36 on a full bracelet weighs well above 150 g. A steel replica with plating sits under that figure. Ask for a photo of the watch on a scale next to a coin for size reference. Ask what happens if the watch fails an XRF scan or a gold acid test at a jeweler.
Legal exposure in the US
18 U.S.C. § 2320 covers trafficking in counterfeit goods. A first offense carries up to 10 years in prison. CBP seizes counterfeit watches and jewelry at ports of entry, and a single imported piece can end in seizure and destruction. Resale is the larger risk: one sale can be charged as trafficking.
Checks before you pay
- Match the reference number to Rolex's catalog. No match, no reference.
- Ask for a movement photo and a caseback photo.
- Ask for a weight photo on a scale.
- Ask for the plating thickness in microns, in writing.
- Assume zero resale value and no service path.
What you give up
Water resistance is untested on most replicas, so swimming is a risk to the movement. Gaskets are generic. A service costs more than the watch in many cases. Resale is near zero because no dealer will take a counterfeit in trade.