Collectible coins encompass various types, including patterns and trial coins that hold historical significance. In the United States, trial coins are often struck as experimental pieces to test designs or minting processes before official production. An example is the trial coin from 1805, which showcases early American coinage and is often associated with the Philadelphia Mint's efforts to refine currency. These items, due to their rarity and unique characteristics, are highly sought after by collectors.

Item Denomination Series Year Mint
1805-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1805 Philadelphia
1805-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1805 Philadelphia