The $20 Liberty Gold, also known as the Liberty Head or Coronet Head type, was minted in the United States from 1849 to 1907. The Type 2 variant, which features a slightly different design than Type 1, was produced from 1866 to 1876. The 1875 Carson City mint mark indicates that the coin was produced at the Carson City Mint in Nevada, which is known for its limited mintage and higher rarity. As a popular collectible, this coin is sought after by numismatists for its historical significance, gold content, and the intricacies of its design.