Collectible coins encompass a wide range of categories, including patterns and trial coins, which are experimental pieces that often differ from standard mint issues. The 1880 trial coins from the Philadelphia Mint serve as significant examples, as they were created to test new designs and minting processes before the official release of currency. These trial coins can showcase unique features and details, making them desirable among collectors for their historical value and rarity. The United States has a rich history of producing such collectibles, with varied types appealing to diverse interests within numismatics.

Item Denomination Series Year Mint
1880-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1880 Philadelphia