Collectible coins encompass a variety of types, including patterns and trial coins, which are often created as prototypes or experimental pieces. The 1823 One Cent Penny, part of the United States Mint's trials for coin production, is a notable example. Patterns are typically struck in small numbers and can exhibit unique designs or metal compositions, making them highly sought after by numismatists. Collecting such pieces often reflects historical significance and artistic innovation within coinage.

Item Denomination Series Year Mint
United States of America 1823 Philadelphia Patterns & Trial Coins 1¢ 1¢ (One Cent, Penny) Patterns & Trial Coins 1823 Philadelphia