Collectible coins, particularly from the United States, include a variety of types such as patterns and trial coins. Patterns are experimental designs created to test new coin concepts before official production, often made in small quantities and highly sought after by collectors. Trial coins, like those from 1880, serve a similar purpose, showcasing different metals, sizes, or designs. Both types are known for their rarity and historical significance, contributing to their value in the numismatic market.

Item Denomination Series Year Mint
1880-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1880 Philadelphia