The reverse designs range from abstract scroll-work with ornate denomination identifiers to reproductions of historical art works.
The series 1928 gold certificate reverse was printed in black and green (see History of the United States dollar).
Although they remain legal tender in the United States, high-denomination bills were last printed on December 27, 1945, and were officially discontinued on July 14, 1969, by the Federal Reserve System[10] because of "lack of use".
[nb 1] Beginning in July 1969, the Federal Reserve began removing high-denomination currency from circulation and destroying any large bills returned by banks.
These larger denomination bills were mainly used by banks and the federal government for large financial transactions, which was especially true for gold certificates from 1865 to 1934.
The purpose of the United States currency system is to serve the needs of the public and these denominations meet that goal.