The DT 10, or the 1861 Patterns Die Trials, refers to a specific series of coin designs produced as trial pieces to test designs and minting techniques for the United States’ coinage. These trial coins, particularly associated with the 1861 era, are notable for their unique characteristics and historical significance. They often exhibit distinctive features that differentiate them from regular issue coins, making them highly sought after by collectors. The Patterns Die Trials provide valuable insight into the minting process and the evolution of coin designs in the United States.

Item Denomination Series Year Mint
1861 DT$10 Clark Gruber Copper Die Trial DT$10 Patterns & Die Trials 1861 Denver, Colorado