Collectible coins are categorized into several types, including commemoratives, bullion, and error coins, each appealing to different collectors based on factors like rarity, historical significance, and condition. The United States Mint produces a variety of coins and medals, with specific designs often tied to historical events or cultural milestones. The Julian reference could indicate a guide or cataloging system used for identifying coins and their values. The 1942 Philadelphia Mint issues include various denominations, with some becoming highly sought after due to low mintage or unique features. U.S. Mint medals also have distinct collectible value, often commemorating significant events or individuals in American history.

Item Denomination Series Year Mint
1942 Jk-Ac-87 U.S. Assay Commission Ae Ms Other / Varied U.S. Mint Medals - Julian 1942 Philadelphia