Collectible coins encompass a wide range of types, including both historical and modern issues. In the United States, coins such as the "Four-Dollar" pieces, which are known for their rarity and unique designs, attract collectors. Patterns and trial coins represent experimental or proposed designs that were not mass-produced, making them highly sought after due to their limited availability and historical significance. These categories contribute to the rich diversity of American numismatics, reflecting various monetary policies and artistic trends over time.

Item Denomination Series Year Mint
United States of America 1880 N/A Patterns & Trial Coins $4 $4 (Four Dollars) Patterns & Trial Coins 1880 N/A
United States of America 1880 Philadelphia Patterns & Trial Coins $4 $4 (Four Dollars) Patterns & Trial Coins 1880 Philadelphia