Collectible coins, particularly in the context of the United States, include various types such as patterns and die trials, which are often produced in limited quantities to test designs or minting processes. The term "DT" refers to "Die Trials," indicating coins that were struck to evaluate new designs or experimental techniques. The 1850 patterns from the Salt Lake City Mint are notable examples, as they represent the early experimentation in coinage during a time of significant economic development in the region. These coins are sought after by collectors for their historical significance and rarity.

Item Denomination Series Year Mint
1850 DT$5 Mormon Copper Uniface Restrike RB DT$5 Patterns & Die Trials 1850 Salt Lake City, Utah