Answer first
IW323794 does not match a reference in IWC's published catalogs that I can confirm. IWC Ingenieur Automatic references from the same era sit in the IW3239x range, such as IW323906 and IW323902. A listing that uses IW323794 can be a typo, an internal factory code, or a number the seller made up. Ask for the exact IWC reference and a photo of the caseback engraving before payment.
How IWC reference numbers work
IWC writes references as IW plus digits. IW323906 splits into IW3239 for the model family and 06 for the variant. Modern Ingenieur, Portofino and Pilot models use six digits after IW. A seven digit string with no catalog match is a caution flag. It is not proof of a fake by itself. Some numbers appear only on limited runs or on watches sold in one market.
Screws, case and dial: what to measure
The Ingenieur line carries five screws on the bezel, a Genta design cue from 1976. Replica cases get the count right and the details wrong. Check screw head shape, slot alignment, and screw height above the bezel. A genuine slotted head is a single flat cut, not a cross. Measure the case with calipers and compare against the size the seller lists. A 1mm difference changes the bracelet taper and the crystal gasket. On the dial, look at the applied markers, the date window edge, and the anti reflective coating. Genuine sapphire shows a faint blue or purple tint at an angle.
Movement tiers
Wholesale sellers fold movements into tiers. Tier 1 is a Chinese automatic, often a Seagull ST2130 at 28,800 vph. Tier 2 is a Miyota 9015, also 28,800 vph, with 42 hours of power reserve. Tier 3 is a decorated clone of an ETA 2892 or a Sellita SW300. Ask for the beat rate and a timegrapher photo. 28,800 vph equals 8 beats per second. A rate spread under 10 seconds per day across four positions is a pass. A spread over 20 seconds per day is not.
Price bands
Asking prices in wholesale listings cluster in bands. Entry automatics: $60 to $120. Mid tier with a Miyota or a decorated rotor: $150 to $300. Top tier IWC replicas with a clone movement and a sapphire crystal: $350 to $600. Above $700 the extra money goes to the seller, not to the watch. Under $50 expect quartz or an unmarked movement.
QC checklist before you pay
- Caseback photo with the reference digits readable.
- Movement photo with the rotor turned, so the balance and jewel count show.
- Calipers photo on the case, lug to lug and thickness.
- Timegrapher photo with rate, amplitude and beat error.
- Crown action video: winding, date flip at midnight, hand alignment.
Open questions
I cannot confirm an IWC model at IW323794. I cannot confirm a factory that ships a replica under that number. Get the caseback photo, the movement photo, the caliper reading and the timegrapher reading before money changes hands.