Understanding all the codes on u.s. currency

[49er12]

Anyone ever study or no what codes or other hidden marks are on the dollar bills etc. 13 stars, owls, eye on the pyramid. What’s the real story anyone discovered the truth.

 

[Charlie P. (NY)]

https://www.uscurrency.gov/denominations/

You have to hover your cursor over the hyperlink text and than click down to "Symbols" for each denomination.


But I think the "owl" on the $1 is due to an overactive imagination.