The short answer
A fake IW545110 is a counterfeit IWC watch sold under a reference number that belongs to IWC's IW5451 family. Genuine pieces are built in Schaffhausen, Switzerland, carry a unique case serial, and use an IWC movement. Counterfeits copy the outside. The inside is a generic automatic caliber, most often from a Chinese factory.
IWC does not publish a public serial lookup that covers every reference. Confirm the exact model name and reference with IWC or an authorized dealer before you buy.
Case and crystal
- Genuine: sapphire crystal with antireflective coating on both faces. At an angle you see a blue-violet tint, not a flat white glare.
- Genuine: sharp case edges, even brushing, polished bevels that meet at one clean line.
- Fake: soft edges, wide gaps at the lugs, brushing that runs in the wrong direction.
- Crown engraving on a fake is shallow and off center. Genuine engraving is deep and centered.
Dial and hands
- Applied indices sit flat and reflect light. On fakes the markers are glued, sit high at one corner, or are printed.
- Check the text: font weight, letter spacing, and the spelling of Schaffhausen. Fakes use thicker strokes and wrong spacing.
- Date aperture edges are sharp and the disc sits centered. Counterfeit apertures are cut with hand tooling and look oval.
- Genuine hands are polished on the bevels and satin on the flats. Fake hands are uniform and dull.
Movement and caseback
- Genuine caseback engraving shows the reference, case serial, model name, and Swiss Made. The cut is deep.
- The case serial matches the warranty card and the movement number in IWC service records.
- A fake rotor spins with a loud whirr. Winding feels rough. The second hand stutters.
- Many counterfeits lose time overnight and stop before morning. A genuine IWC runs past 40 hours on a full wind.
Price and paperwork
- New IWC watches from an authorized dealer start above 5,000 USD.
- Listings near 200 to 600 USD are counterfeits by definition.
- Used pieces with box, papers, and a service history exist. Ask for the invoice and the service receipt.
Legal note, United States
Importing counterfeit goods is barred under 19 U.S.C. 1526. Customs can seize the shipment. The trademark owner can file a civil claim against the buyer or seller. Selling a counterfeit as genuine is trademark infringement.
Before you pay
- Ask for photos of the caseback, the serial, and the reference.
- Ask for a service receipt from an authorized center.
- Take the watch to an IWC authorized service center and request a service quote. The watchmaker confirms authenticity during intake.