Collectible coins encompass a wide range of numismatic items, including historical coins, commemorative pieces, and medals. American Institute Medals, such as the Harkness Medal issued in 1856, are notable examples originating from the United States. These medals often commemorate significant contributions in fields like science and technology. The value of such collectible coins is largely determined by factors like rarity, historical significance, condition, and demand among collectors.

Item Denomination Series Year Mint
(1856-1860) Hark-80 American Institute Bronze Ms Other / Varied American Institute Medals - Harkness 1856 Unknown