Auction sale catalogs act as a historical record of the numismatic market, preserving pedigree data and presenting the state of numismatic knowledge that existed when the catalog was created. Although ultimately marketing tools, auction catalogs often contain original research found nowhere else. The Newman Portal includes over 16,000 catalogs created by more than 300 different auction firms.
Auction sale catalogs act as a historical record of the numismatic market, preserving pedigree data and presenting the state of numismatic knowledge that existed when the catalog was created. Although ultimately marketing tools, auction catalogs often contain original research found nowhere else. The Newman Portal includes over 16,000 catalogs created by more than 300 different auction firms.