In his "Famous Philatelist" series of 19 different interviews, Dr. Stanley Bierman talks with highly regarded collectors on a variety of topics and specialties.  Dr. Bierman is the author of "The World's Greatest Stamp Collectors" and "More of the World's Greatest Stamp Collectors."

Some of the interviews include: 

• David Feldman - Dr. Stanley Bierman interviews professional philatelist, auctioneer and author David Feldman.  Feldman shares his knowledge of the Alexandria Blue Boy, 3-skilling Banco Swedish color error.
• Andrew Levitt, a highly regarded philatelist and founder of the auction house Nutmeg Stamp Sales Inc., is interviewed about his life and experiences by Dr. Stanley Bierman.  Levitt talks about the 1-cent Black on Magenta British Guiana and his involvement with Robert Siegel and Sotheby Parke Bernet.
• Walter Mader, president of the major U.S. auction house, Ivy & Mader, is interviewed about his life and experiences by Dr. Stanley Bierman.  Mader discusses rarity offerings and panes of 1847 issues, along with his association with Robert Siegel.
• Stanley Piller, professional philatelist and expert on the New York Postmaster's Provisional, is interviewed about his life and experiences by Dr. Stanley Bierman. Piller talks about his involvement with Stan Richmond and Andy Levitt. He also discusses the building of the Kapiloff collection and New York Postmaster Provisionals.

and many more! All of the interviews can be found here or by going to https://stamps.org/learn/c3a-online-learning > Enter C3a >products (in the dropdown menu under Ecommerce on the left) > selecting videos under the categories menu on the left of the page >clicking on Famous Philatelist Interviews under the same menu.