In collectible coins, patterns and trial coins represent experimental pieces created to evaluate new designs or compositions before official production. The 1866 Five Dollar coin, associated with the United States, is particularly significant as it marked the introduction of the Liberty Head design on gold coins. Patterns from this year often exhibit variations in design and metal content, making them highly sought after by collectors due to their historical importance and rarity.

Item Denomination Series Year Mint
United States of America 1866 Philadelphia Patterns & Trial Coins $5 $5 (Five Dollars) Patterns & Trial Coins 1866 Philadelphia