Issued in two series only, 1890 & 1891, in denominations of $1 to $1000. These notes were issued specifically for the purpose of buying silver bullion under the terms of the Sherman Silver Purchase Act of 1890. Briefly, they were issued in lieu of Silver Certificates. They were redeemable in “coin,” but the notes didn’t specify redemption in either silver or gold. By the late 1890’s, Treasury reserves of silver had increased dramatically, and Silver Certificate production consequently increased. At this point, Treasury Notes were no longer issued, and gradually were retired from circulation (although they remain legal tender). Series 1890 notes feature much more ornate backs and seals than the 1891 series.