The first thing I would do is check the court website or call the court clerk to see if a probate was ever filed for either your grandfather or grandmother's estates. If not, contact your relative who was named executor and ask him what the status of the estate is and about the token gift.
Ask the executor for a copy of the will and ask if a probate matter was filed with the court. If no matter was filed, then you could proceed and probate the estate if needed. If a probate matter was filed, then you need to request an accounting and also suggest that you file a request for notice with the probate court.