Collectible coins, such as the 10 Cents Dime from the United States, represent important historical and economic moments. The 1840 Philadelphia Dime, which is a part of the larger category of trial coins and patterns, was produced as a test of design and production techniques. These trial pieces often hold significant numismatic value due to their rarity and the insight they provide into the minting process of the era. Candidates for collection may include variations, errors, or unique features that distinguish them from standard issue coins.

Item Denomination Series Year Mint
United States of America 1840 Philadelphia Patterns & Trial Coins 10¢ 10¢ (Ten Cents, Dime) Patterns & Trial Coins 1840 Philadelphia