The Susan B. Anthony Dollar was introduced in 1979, as the first small sized dollar coin. Additional production took place in 1980, 1981, and in 1999, following an eighteen year gap. 

 It was the first circulating U.S. coin with the portrait of an actual woman rather than an allegorical female figure such as 'Liberty'.  The reverse depicts an eagle flying above the moon, a design adapted from the Apollo 11 mission insignia that was also present on the previously issued  Eisenhower Dollar. It was one of the most unpopular coins in American history.