Research Sources
Core research sources include the United States Mint, Smithsonian National Numismatic Collection, American Numismatic Association, major institutional collections, certification-service verification tools, auction archives, catalogs, and local historical records.
- United States Mint learning and production resources
- Smithsonian National Numismatic Collection
- American Numismatic Association education and grading terminology
- Certification-service verification and population tools
- Library, museum, archive, newspaper, directory, and auction records