Update on the KMA plate
Thanks to Smokeythecat I found out my box plate is more rare than I thought. I reached out to several people with connections to dealers and appraisers of civil war artifacts. Everyone that has got back to me says that they have never seen one, much less seen one for sale. They are trying to gather more information on it. The Kentucky Military Academy was pre Civil War and changed to the Kentucky Military Institute prior to the war.
Of course the excitement made me go back again to the yard and search for anything else I could find. Nothing found but some melted lead, small brass fasteners, and a lot of trash because I dug every signal.