1839–1891

Christian Gobrecht's Liberty Seated half dollar was the standard 50-cent coin for over 50 years, from 1839 to 1891.

1979–1999

The Susan B.

1856–1858

The Flying Eagle cent was the US Mint's answer to a problem: the old large copper cent was too big and too expensive to produce, but switching to a small coin required an act of Congress.

1932–1964

The Washington quarter was originally conceived as a one-year commemorative for the 200th anniversary of Washington's birth - then kept in production permanently.