The 1866 three-cent coin is part of a small denomination series issued by the United States, primarily to ease transactions during the expanding economy of the 19th century. Patterns and trial coins from this year are significant for collectors, as they represent experimental designs and compositions not released for general circulation. The 1866 three-cent pieces often feature distinctive design attributes, making them highly sought after in numismatic circles. Collectors value such pieces for their historical significance and rarity, especially in pristine condition.

Item Denomination Series Year Mint
United States of America 1866 Philadelphia Patterns & Trial Coins 3¢ 3¢ (Three Cents) Patterns & Trial Coins 1866 Philadelphia