Collectible coins encompass various types, including United States Mint medals, which are non-circulating items often created to commemorate significant events, people, or anniversaries. The Julian catalog is a system used to reference U.S. Mint medals and includes details such as issuance dates and mint locations. For example, a medal from 1930 minted in Philadelphia would be categorized based on its design, purpose, and historical significance, appealing to collectors for its rarity and artistry.

Item Denomination Series Year Mint
1930 Jk-Ac-74 U.S. Assay Commission Ae Ms Other / Varied U.S. Mint Medals - Julian 1930 Philadelphia