Short answer
A fake IW328098 is any watch offered as IWC reference IW328098 that IWC never produced. The reference sits inside the IWC Pilot's Watch family, which is why most copies start life as a generic Pilot-style case with an IWC dial printed on top. The number on the paperwork proves nothing by itself. Caseback engraving, dial printing, crown profile, movement finishing, and the paper trail are what separate a genuine watch from a copy.
This guide covers the checks a buyer can run before money changes hands. It also covers the difference between a replica sold openly as a replica and a fake sold as the real thing. The first is a known market. The second is fraud.
Prerequisites
- A loupe, or a phone with a macro mode
- Calipers or a steel ruler with half-millimeter marks
- A kitchen scale that reads to one gram
- A spring bar tool
- The seller's photos saved at full resolution
- Calm hands and good light
How to check an IW328098 before you pay
- Write down the reference number from the listing and check it against IWC's own model list. Note the case diameter, dial color, strap or bracelet option, and movement family that IWC publishes for that reference.
- Save the seller's dial photos and zoom in. Compare the "IWC" lettering and the "SCHAFFHAUSEN" line against a confirmed example of the same reference. Look at letter weight, spacing, and alignment with the index markers.
- Inspect the date window. On a genuine IWC Pilot's Watch the aperture has clean cut edges and the date sits centered in the frame.
- Turn the watch over and study the caseback engraving. Genuine engraving has crisp edges and even depth across the letters and numbers.
- Measure the case with calipers. Diameter, thickness, and lug width should match the published figures within about 0.2 mm.
- Weigh the watch head without the strap. A steel case of this size should land in a narrow range, and a light case usually means a hollow or plated body.
- Remove the strap with a spring bar tool and look at the lug holes and the inner faces of the lugs. Look for tool marks, coarse brushing, and drilled holes with rough edges.
- Check the crown. It should screw down with steady resistance, sit flush against the case, and carry the IWC logo in relief with sharp outlines.
- Ask the seller for a clear photo of the movement, or have a watchmaker open the caseback. Read the caliber number, the rotor engraving, and the finishing on the bridges and screws.
- Compare serial numbers. The number on the caseback must match the number on the warranty card and on any service papers, digit for digit.
- Contact IWC or an authorized service center and ask them to confirm the case number for that reference.
- Run a price check on the secondary market for the same reference in the same condition. A price far below the going rate is a warning, not a bargain.
Details that expose a copy
Dial and hands
Copies tend to print the logo too heavy or too thin, and the index markers often sit a fraction off center. Lume plots on a fake glow green or blue under a lamp when the genuine article uses a warmer tone. Hand length is another tell, since short hour hands are common on budget cases.
Case and crown
Look at the transition between the brushed case band and the polished bezel. Genuine finishing keeps that line sharp. A copy usually rounds it off or leaves polishing compound in the gap. Crowns on fakes often feel gritty and stop a half turn short of the case.
Movement
An open caseback ends most arguments. Look for the correct caliber marking, clean perlage or Geneva stripes, and blued screws that are actually heat treated rather than painted.
Paperwork and price signals
A warranty card with a mismatched serial, a missing reference number, or a blank dealer stamp points to a fake or a stolen watch. A seller who refuses an in-person inspection, pushes for a bank transfer, or cannot explain where the watch came from is a risk regardless of the photos.
If the watch turns out to be a copy sold as genuine, stop the deal and report the listing to the platform and to the brand. If you simply want the Pilot's Watch look, buy a replica that is labeled as a replica from a seller who states the materials and the movement openly. That is a different transaction with different expectations, and it keeps the fraud problem where it belongs.