Short answer
A fake IW323721 is a replica of an IWC watch, and the better ones look right from a foot away. The tells live in the parts you cannot see in a listing photo: movement finish, crystal coating, engraving depth, bracelet tolerances, and the way the bezel and crown move. Handle the genuine reference once and five seconds with the replica is often enough.
What replicas get right
- Case proportions and thickness, at least on the higher tiers.
- Dial layout, hand shapes, and printed text, which is simple to scan and copy.
- Overall weight, padded with a thicker caseback or a tungsten insert.
- Bracelet look and clasp branding, close enough for photographs.
What replicas miss
- The movement. A genuine IWC runs an in-house or heavily modified caliber with decorated bridges, blued screws, and clean perlange or Cotes de Geneve. Clones use stock or lightly decorated automatics.
- Crystal coating. IWC's anti-reflective treatment gives a faint blue or violet cast and keeps the dial readable at sharp angles. Cheap replicas show milky or green-tinted glass.
- Caseback engraving. Reference numbers, serials, and water-resistance text sit sharp and deep on the real thing. Fakes use shallow laser etching with fonts that run a touch too wide.
- Lume. Genuine lume charges fast and fades over hours. Replica lume often dies in twenty minutes.
Five checks I run first
- Movement. Look through the display back, or have a watchmaker open the case. Check rotor engraving, jewel count, and whether the finishing matches IWC's standard for that reference.
- Bezel and crown. Count the detents. A real bezel clicks once per minute marker with no play. Thread the crown in and out; genuine threads feel smooth, replicas feel gritty or loose.
- Caseback text. Compare the reference number and serial against IWC's own records. Font shape, spacing, and depth matter more than the words themselves.
- Crystal and dial. Tilt the watch under a lamp. The dial should go near black with a slight color shift. Any haze, rainbow edge, or green tint is a flag.
- Bracelet and clasp. Real links move without rattle, and the clasp closes with a solid snap. Replica bracelets have rough edges on the inside of the links.
Price tiers and what they buy
- Below about $120: quartz movements, plated cases, mineral glass, bracelets that rattle.
- $200 to $400: mid-tier automatics, solid stainless cases, decent dial printing, sometimes sapphire.
- $500 and up: high-end clones with decorated movements, correct case thickness, and sapphire with a coating that comes close.
Even at the top tier, the case is not rated for diving. Treat every claimed water resistance as unverified until a watchmaker pressure tests it.
Questions to ask before buying
- Which movement is inside, and who made it?
- Is the case 316L stainless or plated brass?
- Sapphire or mineral crystal, and is it coated?
- Are the photos of the actual watch you will ship?
- What happens if it arrives dead or the bezel will not turn?
If you already own one
Keep it out of the water unless it has been pressure tested and resealed. Do not overtighten the crown; the threads are the first thing to strip. Store it away from speakers and magnetic clasps. A local watchmaker can grease the gaskets and regulate the movement for very little, and that is the best upgrade you can make to a replica.
If you are judging a watch sold as genuine
Ask for two photos before anything else: the caseback with the serial visible, and the movement. Send the serial to an IWC service center and ask them to confirm the reference. A timegrapher readout helps too, since a genuine IWC should hold a steady rate and amplitude, while a low-grade clone tends to drift. Buy the seller as much as the watch. Paperwork and a service history are harder to fake than a dial.