Quick answer

A fake IW323744 is a replica of an IWC watch sold under IWC reference number IW323744. Genuine IWC watches in the 3237 case family ship with sapphire crystal, a Swiss automatic movement, a case back engraved with the reference and a serial number, and paperwork from Schaffhausen. Replicas copy the case shape and the dial print. They fail on the movement, the engraving depth, the weight, and the papers. Replica listings for this reference sit between $150 and $600. Genuine IWC steel automatics from the same era sell used for $2,500 to $6,000.

What the reference number means

IWC writes references as IW plus six digits. The first four digits name the case family. The last two digits name the variant, such as dial color, bracelet type, or a limited edition run. IW323744 splits into 3237 and 44. Published records for variant 44 are thin, and listings reuse stock photos. Confirm the model from the case back of the watch in hand, not from a listing title.

Movement checks

  • Beat rate. Swiss automatics in this class run 28,800 vibrations per hour, 4 hertz. Record the seconds hand in slow motion. A stutter at 6 ticks per second points to quartz or a low-beat clone.
  • Rotor engraving. Genuine IWC rotors carry the caliber number and the words Probus Scafusia. Replicas show a blank rotor or the wrong caliber.
  • Hacking. Pull the crown to the setting position. The seconds hand stops on genuine models. Many replicas keep running.
  • Winding. Hand-wind 20 turns. The crown should feel even and stop at the clutch. Grit or a hard stop is a replica sign.

Case and dial checks

  • Case back text. Look for IW323744, a serial number of 7 to 8 digits, and a case material stamp. Laser etching on replicas is shallow and gray. Genuine engraving has depth and a bright cut.
  • Crystal coating. IWC applies anti-reflective coating to the inner surface. Tilt the watch 45 degrees under a lamp. Real coating removes reflection. Cheap fakes show a blue or purple haze.
  • Date font. The date wheel font matches the dial print. A thin or wide date numeral is a tell.
  • Lume. Charged lume glows for 4 to 6 hours. Fake lume fades in 20 minutes.
  • Crown. The crown carries the IWC mark. Threads engage in about 1.5 turns and seat flush with the case.

Weight and finish

Steel IWC cases in the 3237 range weigh about 90 to 130 grams on a bracelet. Replicas come in 20 to 40 grams lighter. Links on fakes feel hollow. Run a fingernail along the lug edges and the case flank. Genuine cases break the edge with a polished chamfer. Replicas leave a burr or a rounded blob. Look at the dial under a loupe. Applied markers on genuine dials sit flat and even. Replica markers tilt or show glue.

Price and papers

A genuine full set holds a warranty card with the reference, the serial, and a dealer stamp. A box alone proves nothing. Ask for the serial number and a case-back photo before payment. IWC service centers can verify a watch during service. If the seller refuses a serial photo, stop. No genuine IW323744 sells for $300, and no replica costs $3,000.

Where fakes appear

Social media sellers, classified apps with no escrow, and listings marked unworn or no box. Run a reverse image search on the photos. Replica sellers reuse the same photo set across accounts and names.

If you already bought one

Stop the payment and file a dispute. Credit card chargebacks run 60 to 120 days from the statement date. PayPal covers items not as described for 180 days. Keep the listing text, the messages, and the shipping label. Report the listing to the platform.