Collectible coins encompass a variety of types, including patterns, die trials, and historical pieces, which are often sought after by numismatists. The United States has produced numerous notable coins, such as the 1849 $20 gold coin, which holds significance due to its historical context tied to the California Gold Rush. Salt Lake City, Utah, also plays a role in numismatic history, as various coins and tokens were produced or circulated in the burgeoning western frontier during the 19th century. Patterns and die trials are unique test strikes made by the U.S. Mint, intended to evaluate designs and production methods before mass production. These collectible items can have substantial value based on their rarity and historical importance.

Item Denomination Series Year Mint
1849 DT$2 1/2 Mormon Copper Uniface Restrike RB DT$2 1/2 Patterns & Die Trials 1849 Salt Lake City, Utah