Quick answer
IW545192 belongs to the IWC Portuguese Hand-Wound block, references IW5454. The watch is hand-wound. It has an 8-day power reserve. Fakes of this reference fail in four places: the winding system, the reserve length, the dial furniture, and the caseback markings. A counterfeit with a rotor under the back glass is not a copy of this watch.
IWC does not publish every variant suffix in its public archive. I cannot confirm the suffix 92 against an official list. The case, dial layout and calibre notes below apply to the 5454 block.
Winding system
The 5454 is a manual-wind watch. Wind it and turn it over. There is no oscillating weight. Most 5454 examples carry calibre 98295, a hand-wound movement with an 8-day reserve. Counterfeiters fit automatic movements because they are cheap and common. Look through the sapphire back. A rotor, a solid caseback with no display, or a movement stamped with a factory mark ends the inspection.
Power reserve test
Eight days is 192 hours. Wind the watch to full, note the time, and put it on a shelf. A genuine 5454 keeps running past day six. A copy built on a 6497 or 6498 clone stops at about 40 to 46 hours. Finish is the second signal. IWC finishes bridges with Geneva stripes, blued screws and perlage on the plates. Copy movements show shallow stamped graining and painted screw heads.
Dial and case
- Numerals: applied metal figures on the original. Copies use printed or glued numbers with a visible edge.
- Hands: leaf shape, polished, correct length. Copies run short or show file marks on the underside.
- Sub-seconds: small seconds at 9 o'clock. Check the distance to the dial center and the track printing.
- Printing: the minute track is thin and sharp. Copy dials show thick ink and uneven spacing.
- Glass: sapphire front and back with anti-reflective coating. Plastic or mineral glass scratches at an inconspicuous edge.
Caseback, numbers, papers
Read the engraving. Reference, case number and movement number must appear and must agree with the papers. Depth of cut matters. Laser-etched copies look gray and flat. Original cuts are crisp. Serial numbers should return a service record at an IWC service center. Ask the seller for the service history. Ask for the number before payment.
Price and seller signals
A steel 5454 trades in the four figures on the pre-owned market. Gold examples sit higher. A listing at 10 percent of market value is a fake or a scam. Stock photos, no movement images, no box and papers, a seller who refuses a service-center check: treat these as stop signs. Confirm prices against current listings, because the market moves.
Verification
The last step is physical. Take the watch to an IWC service center or an authorized watchmaker. A service estimate includes serial verification. That check costs little compared with the price of a fake.