Collectible coins include various types such as patterns and trial coins, which are struck to test designs and minting processes. One notable example is the 1859 pattern trial coins for the United States One Cent Penny, created to evaluate potential changes to the design and composition prior to standard production. These rare coins are highly sought after by collectors due to their historical significance and limited availability.

Item Denomination Series Year Mint
United States of America 1859 Philadelphia Patterns & Trial Coins 1¢ 1¢ (One Cent, Penny) Patterns & Trial Coins 1859 Philadelphia