Mark has been a numismatist since 1975 and is one of the most respected experts in the industry. Mark’s career includes 23 years of membership with The Professional Numismatic Guild and over 10 years of authenticating gold for the ANA. Additionally, Mark was a part-time grader for NGC in the early years of professional coin grading.
Mark has been credited as the first dealer to sell a single coin for over one million dollars. He has bought and sold in excess of one million gold coins, including almost every gold coin in The Red Book, as well as most major silver rarities. Mark has contributed to both The Red Book and The Blue Book and is a wealth of numismatic knowledge.
Mark holds membership in the following professional organizations:
American Numismatic Association: LM#2251
Florida United Numismatists: LM#625