Short answer
IW93857 is not a reference number in IWC Schaffhausen's published catalog. IWC prints the letters IW followed by four to six digits. The digits group models by family. A five digit block that starts with 93 does not match a family IWC lists. Listings that use "replica IW93857" use a seller label, not a factory reference.
How IWC reference numbers work
IWC uses the prefix IW plus a numeric block. Catalog examples include IW371617 for the Portuguese Chronograph, IW377714 for the Pilot's Chronograph, and IW356501 for the Portofino Automatic. Older references use four digits. Dealers add a two digit suffix for dial and strap variants. The full number stamped on the caseback runs 8 to 9 characters.
Replica sellers shorten the number or invent one. A listing that shows only IW93857 gives no family, no case size, and no movement type.
Why the code appears in replica listings
Factories and resellers assign internal codes. These codes change between batches. The same watch can appear as IW93857, as a factory name, or as a version number. There is no central registry. Two sellers can use IW93857 for two different watches.
What to check in a listing
- Case diameter in millimeters, measured without the crown.
- Movement type: quartz, automatic, or hand wound, plus beat rate.
- Dial layout: subdial positions, date window shape, font of the numerals.
- Caseback engraving: reference, serial, and case material.
- Weight in grams and lug width in millimeters.
A listing that omits these numbers gives a buyer nothing to compare. Photos with a ruler or a scale are the only useful evidence.
Legal status in the United States
Counterfeit watches are illegal to sell or import in the US. 18 U.S.C. Section 2320 covers trafficking in counterfeit goods. U.S. Customs and Border Protection seizes shipments that carry counterfeit marks. A buyer who resells a counterfeit watch can face the same statute as the seller.
Points that stay unknown
No public source confirms a watch with the code IW93857. Photos in a listing can be copied from another seller. Movement photos can come from a different watch. A code alone cannot verify a batch, a factory, or a date of production.