Die Trials, or Patterns, are experimental coins created by mints to test new designs or modifications before production. The 1861 Pattern coins from the United States serve as important numismatic pieces, showcasing the transitional designs and innovations of that era. These coins, often minted in limited quantities, are highly sought after by collectors due to their historical significance and unique characteristics, making them valuable in the collectible coin market. The DT 20 designation refers to a specific type of 1861 Pattern coin within this category.

Item Denomination Series Year Mint
1861 DT$20 Clark Gruber Copper Die Trial DT$20 Patterns & Die Trials 1861 Denver, Colorado