Quick answer
The main synonyms for replica IW371784 are: "IW371784 rep," "IW371784 clone," "IWC 371784 replica," "Portugieser chronograph replica," "Portoguese chronograph rep" (common misspelling), "IW3717 replica," and "371784 super clone." Sellers also drop the leading "IW" and list it as "371784" alone, or file it under the model family name instead of the reference number. If a search returns nothing, the listing is almost always indexed under the family name, not the number.
Replica IW371784: What to Check Before You Buy
What the reference number covers
IW371784 sits inside the IWC Portugieser Chronograph family, a line defined by a slim round case, a dial with two vertical subdials at 12 and 6, and a tachymeter or plain bezel depending on the version. Reference numbers in this family change with dial color, strap type, and case metal, so two watches that look identical can carry different numbers. Confirm the exact case size, movement type, and dial layout on the maker's own product page before you compare replicas, because sellers often mix features from two references into one listing.
Synonym list buyers actually use
- Reference-only forms: 371784, IW371784, IW3717
- Family forms: Portugieser chronograph replica, Portuguese chrono rep
- Quality-tier forms: super clone, 1:1, AAA, mirror quality
- Misspellings: Portoguese, Portugese, Portugeiser
- Marketplace shorthand: IWC chrono rep, 3717 rep
Run the searches in this order
- Search the exact reference number plus the word "replica" to see how many sellers use it correctly.
- Repeat the search with the family name plus "chronograph replica" to catch listings that skip the number.
- Try the two common misspellings, since some catalogs only index the wrong spelling.
- Add a quality-tier word such as "super clone" to surface higher-priced listings with more photos.
- Compare the returned listings against the official spec sheet and note every mismatch.
Vetting checklist
- Open the seller's photo of the caseback and confirm the engraved reference matches the number in the title.
- Measure the stated case diameter against the official figure and reject listings that are off by more than a fraction of a millimeter.
- Ask for a close-up of the subdial spacing and the date window position.
- Request a timestamped photo, meaning a card or screen showing the current date beside the watch.
- Check whether the seller publishes the movement type, and treat vague answers as a downgrade in tier.
Red flags
- Stock photos reused across several different reference numbers
- Listings that quote three or more case sizes for the same item
- Prices far below the tier the seller claims
- No return policy stated in writing
Legal and practical note
Counterfeit watches carrying a protected brand mark are illegal to sell in the United States, and shipments can be seized at the border. Treat any synonym search as research only, and understand the risk before you send money.