German 12 Mariengroschen ? (1/3 Thaler ? The Thaler (or Taler or Talir) was a silver coin used throughout Europe for almost four hundred years. Its name lives on in various currencies as the dollar or tolar.)
Going to take someone with actual Knowledge on this one
"After the fall of Napoleon, George III regained his lands plus lands from Prussia as King of Hanover, whilst giving up some other smaller scattered territories."