Collectible coins, such as the American Liberty Gold coin, are often sought after by numismatists and investors for their historical significance and intrinsic value. The 20-dollar gold coins, particularly the Liberty Head series minted in 1866 at the San Francisco Mint, are notable due to their limited mintage and the introduction of the design after the Civil War. These coins feature the iconic image of Lady Liberty on the obverse and an eagle on the reverse, making them highly prized among collectors. Their rarity and gold content contribute to their appreciation in value over time.

Item Denomination Series Year Mint
1866-S $20 Motto $20 (Twenty Dollars) American Liberty Gold 1866 San Francisco
1866-S $20 No Motto $20 (Twenty Dollars) American Liberty Gold 1866 San Francisco