numismatically

/ˌnumɪzˈmætɪkli/
adverb
  1. In a way that relates to the study or collection of coins, paper money, and medals.
    • The coin was numismatically significant because of its rare minting error.
    • Numismatically speaking, this banknote is one of the most valuable in the world.
    • She evaluated the collection numismatically, noting each coin's condition and date.