Die Trials, also known as Patterns, are experimental coins struck to test new designs, compositions, or manufacturing processes before mass production. The DT 10 refers to a specific ten-cent coin pattern created during the 1860s. These coins, including the ones from Denver, Colorado, represent a unique segment of U.S. numismatics, as they were not intended for circulation and are often produced in limited quantities, making them highly sought after by collectors. The 1860 DT 10 examples exhibit distinct design features that reflect the artistic and technological aspirations of their time.

Item Denomination Series Year Mint
1860 DT$10 Clark Gruber Copper Die Trial DT$10 Patterns & Die Trials 1860 Denver, Colorado