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 Quantitative Collectors Group (QCG), introduces a new approach that makes it faster and accessible than ever before.
For generations, a handful of third-party graders have controlled coin grading, a process of determining a coin’s condition by evaluating its wear and overall appeal…