Short answer
IW544782 is a reference number from IWC Schaffhausen. It sits in the Portugieser Tourbillon Mystère block. Replica copies of this reference exist, but the count is small. A genuine example sells in the six-figure USD range. Listings for copies run between $300 and $1,500.
The exact variant tied to the digits 82 should be confirmed against IWC records. IWC does not publish a full public reference list, so a dealer request is the reliable route.
How the IWC number works
IWC writes references as IW plus six digits. The pattern is fixed.
- Digits 1 to 4 (5447) name the model family: Portugieser Tourbillon Mystère.
- Digits 5 and 6 (82) name case metal, dial and strap variant.
Two watches in the 5447 block can differ by metal alone. The last two digits carry that difference.
Why few copies exist
The dial carries a flying tourbillon at 12 o'clock. A tourbillon is a rotating cage that holds the balance wheel and escapement. A working cage needs about 70 parts at tight tolerances. Replica factories put tooling money into high-volume models: Rolex Submariner, Rolex Daytona, Audemars Piguet Royal Oak. The 5447 block sells in low numbers, so cost per unit is high.
Copies that do appear fall into two groups. The first uses a decorative cage that spins but does not carry the escapement. The second uses a Chinese tourbillon movement from Sea-Gull or Hangzhou. That movement is a real tourbillon. It is not the IWC calibre, and the bridges, jewel count and finish differ.
Checks on a watch sold as IW544782
Case and metal
The genuine case is 18k white gold or platinum, based on the variant, at about 42 mm. A gold case with strap lands near 90 grams. Plated brass or steel copies come in under 60 grams. Gold hallmarks sit inside the caseback. A copy has none, or has stamps that do not match the metal.
Movement
Ask for a photo of the movement. The IWC calibre number is engraved on a bridge. Replica movements show no IWC marking, or show a printed plate over a generic base.
Serial and papers
IWC records the case number and reference in its archive. A dealer can request a confirmation from IWC. Papers that list a reference number that does not match the case number point to a build from parts.
Legal status in the United States
Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. A first offense carries up to 10 years and a $2 million fine for an individual. U.S. Customs and Border Protection seizes counterfeit watches at ports. Import of one counterfeit watch can lead to seizure and a civil penalty.
If you own one
A replica has no resale channel. Auction houses and IWC service centers decline them. IWC will not service a counterfeit. If you paid for a watch sold as genuine, keep the listing, the payment record and the messages. File with the platform. File with CBP if the watch crossed a border.