Collectible coins, particularly those from the United States, are often categorized by their rarity, historical significance, and minting errors. The DT5c refers to a specific type of die trial, known as Die and Hub Trials and Splashers, which are experimental strikes made to test out designs before actual production. In 1866, significant minting changes occurred, making coins from this year historically noteworthy. Collectors often seek coins with unique features, such as those resulting from the die trial process, due to their limited availability and potential value.

Item Denomination Series Year Mint
1866 DT5c Obverse Uniface Die Trial J-A1866-1 DT5c Die and Hub Trials and Splashers 1866 Philadelphia