Collectible coins, particularly those issued by the United States, include a variety of types such as standard circulation coins, commemorative issues, and proof coins. Among these, trial coins or patterns are specially minted to test new designs or technologies before official release. The year 1922 is notable for several key coins, including the famous 1922 "Weak D" Lincoln penny, which exhibits a distinct minting error. These types of coins are sought after by collectors due to their historical significance and rarity, often commanding high premiums in the numismatic market.

Item Denomination Series Year Mint
1922-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1922 Philadelphia