Map Collecting and Paper Money Sammy Berk, Banknotes & Antique Maps, Harlan J. Berk, Ltd. David Lisot, Interviewer & Producer David Lisot attended the 2015 PCDA show in Rosemont, Illinois, where he met up with Harlan J. Berk’s Banknote and Map expert Sammy Berk. In this video, Sammy describes the market for the stimulating field