Die Trials (DT) are a type of experimental coin struck to test new designs or techniques before mass production. The DT 5, specifically from 1860, is a rare pattern coin associated with the United States Mint. These pieces often feature unique designs that differ from standard currency, showcasing artistic or technical innovations. The Denver Mint, established later, did not produce coins until 1906; thus, any reference to DT 5 from Denver is likely a misunderstanding, as it pertains to the earlier Philadelphia Mint patterns. Collecting these historical pieces is a niche area within numismatics, valued for their rarity and significance.

Item Denomination Series Year Mint
1860 DT$5 Clark Gruber Copper Die Trial DT$5 Patterns & Die Trials 1860 Denver, Colorado