Numismatist noted numismatist who was not an avid collector, and King Farouk I of Egypt was an avid collector who had very little interest in numismatics. Harry Bass by comparison was a noted collector who was also a numismatist. The second group are the coin dealers. Often called professional numismatists, they authenticate or grade coins for commercial purposes. The buying and selling of coin collections by numismatists who are professional dealers advances the study of money, and expert numismatists are consulted by historians, museum curators, and archaeologists. See, for example, the International Association of Professional Numismatists (IAPN) and the British Numismatic
Julius Friedländer (numismatist) he was elected a member of the Berlin Academy of Sciences. From his literary remains Rudolf Weil published "Repertorium zur Antiken Numismatik", a supplement to Théodore Edme Mionnet's "Description des Médailles Antiques", Berlin, 1885. Besides numerous papers in numismatic journals, he wrote: Julius Friedländer (numismatist) Eduard Julius Theodor Julius Friedländer (June 25, 1813 – April 4, 1884) was a German numismatist. He was born on June 25, 1813 in Berlin. Friedländer's entire family embraced Protestant Christianity in 1820. After studying at the universities of Bonn and Berlin, and traveling in Italy (1838–1839), he obtained a position at the "Königliche Sammlung