Collectible coins encompass a wide range of numismatic items, including patterns and trial coins, which are struck to test designs or minting processes. The Fifty Cents coin, particularly from the United States, holds significance in the collectible market. The 1866 Fifty Cents trial coins minted in Philadelphia exemplify this category, as they were produced in limited quantities and often feature unique designs or modifications that appeal to collectors. These coins are valued for their historical importance and rarity.

Item Denomination Series Year Mint
United States of America 1866 Philadelphia Patterns & Trial Coins 50¢ 50¢ (Fifty Cents) Patterns & Trial Coins 1866 Philadelphia