Short answer
"Fake IW323790" is search shorthand for a replica of the IWC reference IW323790. Good examples exist, but they are not all the same watch with a different price tag. A replica worth your money is one where the case profile, dial printing, and hand finishing hold up in daylight, and where the movement inside matches what the seller claims. If a listing cannot answer those three points, move on.
Why the reference number matters
IWC reference numbers are not random strings. The block tells you the case family and the calibre generation, and the final digits usually mark a dial or metal variant. A seller offering an "IW323790" should be able to say which dial configuration that number maps to, what the original case measures, and which movement the genuine watch used. When the reply is "it's 1:1, don't worry about it," that is your answer.
Ask these before you look at a single photo
- Which factory built it, and which version number is this batch?
- What movement is inside, and is it a clone, a decorated ETA-style automatic, or a quartz?
- Which dial variant and bracelet or strap option am I looking at?
- Can you send a timegrapher reading and a macro shot of the dial?
Case and finishing
This is where most replicas give themselves away, and it has nothing to do with the logo. Run a fingernail along the line where brushed surfaces meet polished ones. On a well-made case that transition is crisp and straight. On a cheap one it wanders, and the brushing looks like it was done with a scouring pad. Check the lug tips too. Sharp, uneven lugs are a tell that survives every camera filter.
Crown action is the other quick test. It should thread smoothly, seat without grit, and pull through positions with a firm click. A crown that wobbles or cross-threads on day one will be a paperweight by month six.
Dial and hands
Dial printing is judged at arm's length, not under a microscope, but the tells still matter. Look for text that sits level with the dial edge, indices that line up with the minute track, and a date window that is centered on its aperture. Off-center date wheels are the single most common flaw in mid-tier replicas.
Hand finishing is subtler. Genuine IWC hands are polished on the bevels and matte on the flats, and that contrast catches light differently as you rotate your wrist. Replicas often paint the whole hand in one finish. Ask for a short video in natural light rather than a studio shot. Video exposes flat, lifeless hands faster than any still image.
Movement, honestly assessed
No replica of an IWC reference carries the genuine in-house calibre. What you get is a clone, a decorated third-party automatic, or a quartz movement in a mechanical-looking case. None of those are automatically bad, but the price should reflect which one you are getting. A seller who claims an in-house movement at replica prices is either misinformed or lying, and both are reasons to shop elsewhere.
Ask for amplitude and beat error numbers if a timegrapher is available. On a healthy automatic you want a steady reading across positions and a low beat error. If the seller cannot produce one, assume the watch has not been regulated.
Price and after-sale
Prices for a replica IW323790 spread wide, and the cheapest listing is rarely the value pick. Underpriced offers usually mean a quartz movement, a plated case, or a seller who disappears after payment. The sweet spot sits with established factories that publish batch numbers and offer a warranty of some kind.
Once it arrives, do not swim with it. Replica case gaskets are frequently untested, and water resistance claims on listing pages should be treated as marketing until a watchmaker confirms them. Get the bracelet sized by someone who owns the right tools, keep the caseback seal dry, and plan on a service if the movement starts losing more than a few seconds a day.
The bottom line
Judge the replica on what you can see and verify: case finishing, dial alignment, crown feel, and the movement the seller actually names. Reference numbers only help if the person selling to you understands them. Buy from someone who does.