Interest bearing notes are the American Civil War-era paper money-related emissions of the treasury. This includes the one- and two-year notes authorized by the Act of March 3, 1863, which bore interest at five percent, were a legal tender at face value, and were issued in denominations of $10, $20, $50, $100, $500 and $1000. Extant circulated interest bearing notes are rare, and none of the $1000 denomination are known to exist.
Shown here is an interest bearing note in the denomination of $50, issued in 1864. Upon maturity of the note two years after issue, 5% interest was payable. The note features vignettes of Caduceus, Justice with Shield, and America on its obverse.
See another denomination: $10, $20, $100Banknote: American Bank Note Company and National Bank Note Company; image courtesy of the National Numismatic Collection at the National Museum of American History (Smithsonian Institution)