David W. Lange

David W. Lange is Director of Research for Numismatic Guaranty Corporation (NGC) and the author of nine books on United States coins and related subjects. He holds life memberberships in the American Numismatic Association and the Numismatic Literary Guild. Aside from his professional work in numismatics, Lange collects and researchers coin collecting boards, folders and albums and maintains a website on this subject: www.coincollectingboards.com.