Collectible coins encompass various categories, including patterns and trial coins. The 1846 patterns known as "Trial Coins" were minted as experimental pieces, often to evaluate new designs or changes in coin specifications. The United States issued several denominations, including the Two and a Half Dollar coin, also referred to as the quarter eagle, which featured gold content and was produced intermittently throughout the 19th century. These coins are highly sought after by collectors due to their historical significance and rarity.

Item Denomination Series Year Mint
United States of America 1846 Philadelphia Patterns & Trial Coins $2.50 $2.50 (Two and a Half Dollars) Patterns & Trial Coins 1846 Philadelphia