Short answer
A fake IW328039 is a watch sold with the IWC reference number IW328039 on the listing, box, or case back. IWC Schaffhausen does not make it. The number follows the IWC format: IW plus six digits, where the digits point to a model family, a case metal, and a dial variant. Listings that use this term mix two products: a counterfeit built to pass as genuine, and a replica sold as a copy.
IWC has not published a note that ties IW328039 to one model in every market. Check the number on IWC's own catalog before you trust a spec sheet from a seller.
How IWC reference numbers work
IWC numbers start with IW. Six digits follow. The first four digits set the family and the case size. The last two set the dial and the metal. Numbers in one block share a case, a movement, and a lug width. A counterfeit seller copies the block and changes one digit, so a search for IW328039 can land on a watch that shares a case with a real model but carries a number that does not exist.
Points to compare against a genuine watch
- Case back text. Genuine IWC engraves the reference and serial with cut edges. Fakes print or laser-mark the same text with flat edges.
- Movement. Current IWC automatic calibers beat at 28,800 vph. Cheap fakes use a quartz module or a low-grade automatic with a rough rotor.
- Dial furniture. Genuine applied indices have polished bevels. Fake indices sit flat and reflect one tone.
- Weight. A 40 mm steel case with a bracelet feels solid in the hand. Plated brass and thin cases run light.
- Documents. Genuine IWC ships with a warranty card, a booklet, and a serial that matches the case back.
Price bands
Counterfeit IWC listings sit between $150 and $900. Genuine IWC steel sports watches sell in the four-figure USD range and up. Ask the seller for the invoice and the service history. A seller who cannot name the movement or the case size is guessing.
Five-minute check
- Type the reference into IWC's site. No result means the number is fabricated.
- Read the dial text at 10x. Font weight and spacing on a fake drift at the edges.
- Set the date. Genuine IWC snaps at midnight. A fake creeps for 30 minutes.
- Weigh the watch. Compare with the spec sheet from the maker.
- Match the serial on the case back to the card and the booklet.
Counterfeit, replica, homage
Counterfeit means a watch built to pass as a genuine brand. Replica means a copy sold under the brand name and sold as a copy. Homage means a similar design under a different name. US law treats counterfeit trafficking as trademark infringement under the Lanham Act, with civil damages and seizure of goods. The OECD puts the trade in counterfeit goods in the hundreds of billions of USD each year.
What stays unknown
Case data for IW328039 varies between listings. Photos, serial ranges, and dial colors change from seller to seller. Verify each claim against the maker before a purchase. No source in this guide replaces a physical inspection by a watchmaker.