The reverse seems to be the same as 1 vereinsthaler German State Hesse Darmstadt http://en.numista.com/catalogue/pieces15925.html
Ludwig II was king of Bavaria which became part of the German Empire in 1871 so maybe its a commemorative medal for this event ?
Ludwig II was king of Bavaria which became part of the German Empire in 1871 so maybe its a commemorative medal for this event ?




















