Collectible coins, particularly in the context of the United States, often include special anniversary gold issues, such as the 20th Anniversary Gold American Eagle or the 20th Anniversary Gold Buffalo. These coins are typically minted to commemorate significant milestones in U.S. numismatic history and may feature unique designs or finishes. They often come in limited quantities, enhancing their appeal to collectors and investors alike. Due to their gold content, limited mintage, and collectible nature, these anniversary issues can appreciate in value over time.

Item Denomination Series Year Mint
2009-P (Philadelphia) Anniversary Gold Issues $20 (Twenty Dollars) Anniversary Gold Issues 2009 Philadelphia