Collectible coins encompass a wide range of items, including coins struck for circulation, commemorative issues, and specially produced patterns or trial coins. The United States Mint often created trial coins, which are test pieces produced to evaluate new designs or minting processes. Specifically, the 1907 trial coins produced in Philadelphia are notable for their experimental designs and play a significant role in numismatic history, attracting collectors due to their rarity and the insight they provide into early 20th-century American coinage.

Item Denomination Series Year Mint
1907-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1907 Philadelphia