Found this today and am not sure about it. By my best measurment it is 9/16+" wide and 3/4+" tall. The base is dished out. It is hard to tell from the pictures but it is a two ringer.
Could it be a 54 Burnside?
Thanks,
I found it at the same site that gave me the badge in my avatar. I wonder if it might have come from a prisoner at Andersonville as well.
I will mark it solved.