Collectible coins and medals encompass a wide range of numismatic items, including currency produced for general circulation, commemorative coins, and awards like the Agricultural Mechanical Society Award Medals. The United States has a rich history of issuing various collectible pieces, including those given as honors for achievements in fields such as agriculture and mechanics. The Harkness Medals, awarded in 1887, exemplify this by recognizing excellence in relevant societal contributions, representing a tangible connection to historical events and achievements. Collectors prize such items for their rarity and the stories they tell about the cultural and technological context of their time.

Item Denomination Series Year Mint
1887-- (Unknown) Agricultural & Mechanical Society Award Medals - Harkness Other / Varied Agricultural & Mechanical Society Award Medals - Harkness 1887 Unknown