Belgium
50 Francs 6.2.1837. Société Générale pour Favoriser l'industrie Nationale, 2 x stamped 'Annulé / Trésor'. Pick 22. Third known example. Except the piece of the Collection of Belgian National Bank and a second one in a private Collection seems only this one to be known. Key Note for Belgian Banknotes.
Of the highest rarity. Top repaired, otherwise very fine