Short answer first
On a replica IW323794, the case and the bracelet decide everything. Movement comes second. The dial matters at close range, but nobody reads your dial from across a room. A copy with tight end links, even brushing, and a bracelet that tapers without rattling will pass at a table. A copy with a mirror-shiny case and loose links will not, whatever engine sits inside it.
Pull the real specs before you shop
Sellers use this reference number in a loose way, and some attach it to the wrong case size, dial color, or bracelet type. Start with IWC's own product page for the reference, then write down the diameter, thickness, lug width, caliber, and water resistance. I keep that list in a phone note and check every listing against it. It kills a lot of wasted messages.
If a listing shows a stock photo and a spec sheet that does not match the official numbers, that tells you something useful about the seller.
Case: brushing, bevels, gaps
This is where most replicas give themselves away. Look at how the brushed surfaces meet the polished edges. On a good case the line between them is sharp and straight. On a cheap one it wanders, or the whole case is polished because that is easier to produce.
- Brushed flats should run in one direction, not swirl under light.
- Bevels should catch light as a thin, even band.
- End links should sit flush with the case, no visible gap, no side-to-side play.
- The crown should screw down without grit and line up with the case band.
- Caseback engraving should be crisp, with correct text and spacing.
Bracelet and clasp
Ask for a photo of the bracelet lying flat, then one of it on a wrist. Solid links matter more than link count. Shake it in a video: a good bracelet moves as a unit with a faint sound, a bad one rattles like a tin of coins. Check the taper from the first link to the clasp, and check that the clasp closes with a firm click and no side play. Sharp inner edges on a clasp will chew your wrist within a week.
Dial and hands
Look for applied markers that sit level and reflect light the same way. Printed text should be clean at the edges, not thick or fuzzy. The date window is a common weak point: wrong position, wrong size, or a font that is too bold. Hands should be flat and clean with no burrs. Lume should be applied evenly, with no spill onto the dial.
Movement tiers
Entry builds use a basic automatic with a stamped rotor and rough winding feel. The middle tier uses a decorated or cloned movement that looks right with the back open. The tier worth paying for runs an ETA or Sellita in Elaboré or Top grade, or a well-built clone of a current IWC caliber. Ask for a photo of the movement and a timegrapher shot showing rate, amplitude, and beat error. A seller who cannot send those is guessing too.
Prices you will see
Roughly: under $200 gets you a decent look with a cheap movement and a hollow bracelet. $250 to $450 gets better case work, a solid bracelet, and a mid-tier movement. Above that you are paying for a Swiss-grade movement, better crystal coating, and tighter quality control. Decide which of those you actually want before you start comparing.
Checks before you send money
- Video of the watch running, with the seconds hand visible.
- Timegrapher reading in seconds per day.
- Photos of the bracelet flat, the clasp closed, and the caseback.
- Confirmed case diameter and lug width in millimeters.
- A stated return window in writing.
What I would skip
Listings with no measurements, no movement photos, and prices that sit far below the rest of the market. Also skip any seller who claims a waterproof rating you cannot test. Treat every replica as splash resistant at best, and keep it away from the pool.