coins \ Coin \ United States of America \ $20 (Twenty Dollars) \ American Liberty Gold \ 1878 \ Philadelphia
Collectible coins encompass a variety of types, including historical issues, commemorative coins, and bullion. The United States has a rich numismatic history, with examples like the Twenty Dollar gold pieces, particularly those featuring the American Liberty design. The 1878 Philadelphia mint issue stands out among these for its historical significance and artistic merit, often sought after by collectors for its representation of American coinage and the gold standard era. These coins are valued not only for their metal content but also for their rarity and condition.