Collectible coins encompass a broad range of items, including historical coins, commemorative issues, and medals. Agricultural medals often celebrate agricultural achievements and advancements, while mechanical society awards recognize contributions to engineering and technology. The United States has produced various medals, including those issued by organizations such as the Harkness Society. The 1940 Harkness medal reflects a specific point in history and may have unique characteristics that appeal to collectors, although its exact significance or rarity remains unspecified. Collectible coins and medals can vary widely in value based on condition, rarity, and historical context.

Item Denomination Series Year Mint
1940-- (Unknown) Agricultural & Mechanical Society Award Medals - Harkness Other / Varied Agricultural & Mechanical Society Award Medals - Harkness 1940 Unknown