Short answer

Replica IW938751 is a listing code from a replica seller. It does not match the IWC reference format. IWC writes references as IW plus six digits, for example IW377710 or IW500705. This guide found no IWC product page for IW938751. Confirm the number on iwc.com before you send money. Ask the seller for the model name and the true reference the watch copies.

How an IWC reference number is built

IWC uses the prefix IW and six digits. Collectors read the digits in pairs. The first pair names the model family. The second pair names the variant. The last pair names the case and dial combination. A Pilot's Watch Chronograph 41 carries IW388101. A Portugieser Chronograph carries IW371605. A code that falls outside the IW3, IW4, IW5, and IW7 groups needs direct confirmation from IWC.

Case diameter and movement are the two numbers that separate a real IWC from a copy. A genuine Pilot's Watch Chronograph 41 measures 41 mm across and uses the in-house calibre 69385 with a 46-hour power reserve. A replica of the same model often uses an Asian 7750 pattern movement or a quartz module.

Grade labels sellers use

  • AAA: low grade, mineral glass, plated case, quartz or basic automatic.
  • 1:1: mid grade, 316L steel, sapphire glass, Asian automatic movement.
  • Swiss made: a label, not a standard. The movement is often Asian with a Swiss part.
  • Super clone: top seller tier. Case, dial, and movement are copied from the same model line.

None of these labels come from a testing body. They are marketing terms with no published definition.

Price bands

  • Quartz IWC copies: $40 to $90.
  • Asian automatic with mineral glass: $80 to $180.
  • Sapphire glass and 316L steel: $180 to $350.
  • Chronograph with a modified 7750: $300 to $600.

A genuine IWC Pilot's Watch Chronograph 41 lists above $7,000. A price below $700 for a claimed genuine IWC is a copy.

Legal facts in the United States

Selling counterfeit goods is illegal under 15 U.S.C. 1114 and 18 U.S.C. 2320. Importing them is illegal under 19 U.S.C. 1526. CBP seizes counterfeit watches at US ports and does not refund the buyer. Watches sit among the most counterfeited product groups in world trade data. A seizure letter can arrive months after payment.

Questions to ask before payment

  1. Which IWC model and reference does this copy?
  2. Which movement is inside, and who made it?
  3. What is the case diameter in millimeters?
  4. Is the glass mineral or sapphire?
  5. What is the water resistance rating, and was it tested?
  6. What is the return window and the return address?
  7. Which carrier ships the parcel, and who pays customs?

Checks after delivery

  • Measure the case with calipers. Compare to the spec of the real model.
  • Weigh the watch in grams. A steel case of the same size should land within a few grams.
  • Time the rate over 24 hours. A rate beyond plus or minus 15 seconds per day needs service.
  • Look at the dial print under a 10x loupe. Check the date window alignment and the crown thread.
  • Skip water contact until a shop pressure tests the case. A test costs about $20 to $40.

Bottom line

IW938751 is a seller SKU. It carries no IWC catalog meaning that this guide could confirm. Get the copied model name, the real reference, and the movement type in writing. Then compare those numbers to the IWC spec sheet before you pay.