Collectible coins can be categorized into several types, including numismatic coins, bullion coins, and historical coins. The United States of America has issued numerous collectible coins, with the Twenty Dollar gold pieces, commonly referred to as "Double Eagles," being particularly notable. The American Liberty Gold coin series, which includes designs that celebrate themes of freedom and independence, holds historical significance. The 1851 U.S. gold coinage features intricate designs and represents a period of economic expansion in American history, making it highly sought after by collectors.

Item Denomination Series Year Mint
1851 $20 $20 (Twenty Dollars) American Liberty Gold 1851 Philadelphia
1851-O $20 $20 (Twenty Dollars) American Liberty Gold 1851 New Orleans