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 ...

Numismatics, or coin collecting, has been a popular pastime in the United States (and many other countries) for more than two hundred years. In order to understand the hobby, the novice collector must ...