Also known as the Double Eagle, the first $20 gold piece design was the Liberty Head without motto, issued from 1849 to 1907. The motto was added above the eagle to a second variety of Liberty Head Double Eagles from 1866 to 1876. The third variety of Liberty Head Double Eagles was introduced in 1877 when the denomination was revised from “Twenty D.” to “Twenty Dollars.”
Considered to be one of the most beautiful US coins, the twenty-dollar gold piece designed by Augustus Saint-Gaudens was introduced in 1907. Many variations exist throughout the 26-year series.
Coin images courtesy of PCGS CoinFacts