Collectible coins encompass a wide range of items, including numismatic coins, commemoratives, and patterns. In the United States, trial coins are notable examples, often created to test production processes or designs before mass minting. One significant instance is the 1948 patterns struck in Philadelphia, which feature unique designs that differ from standard issues. These trial coins are sought after by collectors for their historical significance and rarity.

Item Denomination Series Year Mint
1948-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1948 Philadelphia