Address 5681 Redwood Dr. Suite 12B, Rohnert Park, CA 94928
Office Phone(707) 755-7101
DSG is an experienced sports and collector card grading company and has been grading cards since 2001
We are located in California in the San Francisco Bay area.
Ship all orders to the following address:
Diamond Service Grading
PO Box 3550
Rohnert Park, CA 94927