Short answer
A "fake IW323727" is a copy of an IWC watch stamped with that reference number. IW323727 is one exact IWC reference, and it sits in the IW32xx block the brand uses for its Ingenieur Automatic line. Replicas of it exist, and most fail on three things: the movement, the dial print, and the caseback engraving. Everything else you can check in a few minutes with a loupe and decent light.
Know the reference before you judge the watch
A reference number locks in one combination of case size, metal, dial color, bracelet, and movement. IW323727 is not a family, it is a single spec. That matters, because sloppy copies get built from generic photos and end up blending parts from two or three different references. If a seller cannot tell you the case diameter, the movement inside, and whether the bracelet was ever offered on that reference, stop there. Pull the spec from IWC's own catalog and compare it line by line with what is sitting on the table.
The movement is the hardest part to fake
Open the caseback or have a watchmaker do it. IWC Ingenieur automatics from this era use in-house calibres with signed rotors, defined finishing, and published beat rates and power reserves. Replicas almost always run a stock or lightly decorated third-party automatic instead. I look at the rotor engraving first. Real engraving is cut into the metal with depth and a slight burr. Stamped or laser-etched text looks flat and shallow. Then check the jewel count stamped on the bridge, the shape of the balance cock, and how the movement sits in the case. A plastic movement ring is a giveaway on a watch at this price.
Dial, hands, and date
- Applied indices should sit flat, with sharp edges and even lume fill. Raised edges and uneven glow mean a copy.
- Print should stay sharp under magnification. Look at the letter spacing in the brand name and the model line.
- Date fonts differ. Genuine date wheels have a specific numeral shape and sit centered in the window.
- Hands should be polished on the bevels and matte on the flats, with no tool marks on the sweep.
Case, bezel, and caseback
Case finishing is where good replicas get close and cheap ones fall apart. Run a fingernail along the transition between brushed and polished surfaces. On a genuine case the line is crisp and consistent around the whole watch. On a fake it wanders or goes soft. Caseback engraving is the other tell: genuine text is deep, evenly spaced, and follows the curve of the case. Replicas often use shallow laser marking that catches light differently from every angle. Check the lug holes, the crown threads, and the crown tube for burrs.
Bracelet, clasp, and weight
Solid links, tight end-link fit, and a clasp that closes with a firm click are baseline on the real thing. A rattling bracelet with visible gaps between links is not. Weigh the watch. Published weights exist for most references, and a copy that is 20 grams light is usually using thinner steel or a hollowed case.
Price and paperwork
The math is simple. If the asking price is a small fraction of what the reference trades for, it is not genuine, no matter what the listing says. Papers, boxes, and service cards are photocopied and reused constantly, so treat them as decoration, not proof. A service invoice from an authorized center with a serial that matches the caseback is worth more than a full box set.
What a replica cannot do
It cannot be serviced by IWC. It cannot be sold later as a genuine watch without that becoming fraud. Counterfeit trademarked goods are barred from import in the US and can be seized in transit, and carrying one across a border is a real risk. Buying a replica is not a shortcut to owning the watch, it is a separate object with a separate resale value, usually close to zero.
Quick checklist
- Verify the reference spec against IWC's catalog.
- Have the caseback opened and photograph the movement.
- Inspect dial print, indices, and date font under magnification.
- Feel the case edges and read the caseback engraving depth.
- Weigh the watch and check bracelet link gaps.
- Ignore the box and papers. Follow the serial and the movement.