Dollar coin (United States)
The dollar coin is a United States coin with a face value of one United States dollar. Dollar coins have been minted in the United States in gold, silver, and base metal versions. Dollar coins were first minted in the United States in 1794.
An AirBART machine that accepts dollar coins
The Spanish dollar was the basis of the United States silver dollar.
1795 Flowing Hair dollar
The Seated liberty dollar
The United States dollar is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color.
Spanish silver eight-real or peso of 1768
Alexander Hamilton finalized the details of the 1792 Coinage Act and the establishment of the U.S. Mint.
Continental one third dollar bill (obverse)
Series of 1917 $1 United States Note