In mid-1849, legislation was approved to begin minting the $20 Liberty gold coin. At least two of these coins were minted in December of 1849; one is now located in the Smithsonian. Introduced into circulation in 1850, the $20 Liberty immediately became the largest denomination of all regular U.S. coins to date. In all, the $20 Liberty was minted at five different mints throughout its production.
In total, the United States Mint struck three different design types from 1849 to 1907:
Size: $20 Liberty Purity: 90% Weight: 33.436 g Metal Content: 0.9675 oz. Diameter: 34 mm