Les Perelman, a researcher at the Massachusetts Institute of Technology, has been doing some interesting experiments to test the capacity of computerized grading systems to accurately judge the ...

Coin grading is the process by which a certified numismatist determines the grade, or physical condition, of an existing coin. Once the grade is determined, the value of the coin can then be ...

GRAND RAPIDS, MI - A Grand Rapids-based inventor has developed a first-of-its-kind device designed to transform how collectors grade and value their coins. The OCS200, created by Richard Colonna of ...

Coin grading isn’t just for experts—it’s the backbone of understanding a coin’s true value. From the Sheldon Scale to PCGS and NGC’s market influence, knowing the grading process can mean the ...

Coin collecting isn’t just about finding rare pieces—it’s about knowing their true worth and keeping them in top shape. The Sheldon 70-point scale is the gold standard for grading, giving collectors a ...