Collectible coins, particularly in the context of the United States, encompass a variety of types, including patterns and trial coins. Patterns are experimental designs created to test new concepts for coins but were never mass-produced, making them highly sought after by collectors. Trial coins, similar in nature, are struck to evaluate new minting techniques or designs before introducing them to circulation. The year 1875 is significant in the history of U.S. coinage due to various notable issues, including patterns, which can attract considerable interest among numismatists. Unknown origins of certain coins can enhance their mystery and appeal, leading to extensive research and valuation efforts within the numismatic community.

Item Denomination Series Year Mint
1875-- (Unknown) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1875 Unknown