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US bills printed before 1990 didn't have a lot of security features on them. You can still look for the following:

  • Hold the bill up to a light and look for tiny blue and red fibers embedded in the paper. (Note that there won't be a watermark or security strip like newer bills, though.)
  • The paper will have a substantial feel to it, the same as modern bills.
  • If the bill is a green-seal Federal Reserve Note, the denticles (teeth) on the Federal Reserve Seal will be sharp and uniform.
  • The engraving of Jackson's face will be sharply-defined and appear almost 3D if viewed from a slight distance.
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8y ago
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Q: How can you tell if an old US 20 dollar bill is real?
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