Imprint on the reverse side. Piece from the book "Ausser Kurs gesetzte Noten der Bank Polski" which presented specimens of money withdrawn by the occupying forces from Poland. Since the books also contained pieces in circulating condition, banknotes in bank condition are rare. In turn, the reprinted banknotes themselves are extremely rare and have only once appeared on the Onebid auction market. Bank condition. A great rarity being both a specimen and a banknote with additional historical value that is missing from most banknote collections. Even Janusz Lucow did not have it in his collection.