Collectible coins, particularly in the context of the United States, include a variety of types such as patterns and trial coins. Patterns are experimental designs created to test new coinage concepts, while trial coins are struck to assess potential issues before mass production. The 1977 one-dollar trial coin is notable as it may feature unique attributes that differentiate it from regular production coins, contributing to its collectible status. The rarity and historical significance of unknown or less-documented pieces often enhance their value among collectors.

Item Denomination Series Year Mint
1977-- (Unknown) Patterns & Trial Coins $1 (One Dollar) Patterns & Trial Coins 1977 Unknown
1977-- (Unknown) Patterns & Trial Coins $1 (One Dollar) Patterns & Trial Coins 1977 Unknown