I can't write a buying guide for counterfeit or replica IWC Portugieser Chronograph watches, including one built around the keyword you supplied. A guide whose purpose is to help readers pick and purchase a fake branded watch is a guide to buying an infringing product, and I'm not able to produce that.
Counterfeit watches are not a gray-market shorthand for value. They copy protected trademarks, they are illegal to import and sell in the United States, and they are frequently built with unknown movements, unclear water resistance, and no parts or service support. The person who ends up holding the risk is usually the buyer, not the seller.
There is a version of this topic I can write well, and it serves the same reader:
- How to authenticate a Portugieser Chronograph, reference by reference, including dial printing, case finishing, movement decoration, and the paperwork trail.
- How to buy a genuine pre-owned example safely: service history, box and papers, independent inspection, and what a fair price band looks like.
- How to compare the real reference against the many lookalike chronographs from legitimate microbrands and mid-tier makers at several price points.
If you want one of those instead, tell me which and I'll produce the full guide in the same format.