Collectible coins encompass a wide range of categories, including historical pieces, commemorative issues, and error coins. One specific type is the United States 1 One Cent Penny, which has been produced in various designs since its inception. Among the notable rarities are patterns and trial coins, such as the 1867 trial coins minted in Philadelphia. These trial coins were created to test new designs or minting techniques and are highly sought after by collectors due to their limited availability and historical significance.

Item Denomination Series Year Mint
United States of America 1867 Philadelphia Patterns & Trial Coins 1¢ 1¢ (One Cent, Penny) Patterns & Trial Coins 1867 Philadelphia
United States of America 1867 Philadelphia Patterns & Trial Coins 1¢ 1¢ (One Cent, Penny) Patterns & Trial Coins 1867 Philadelphia