The German occupying power intended a kingdom Poland and allowed the new founded national credit bank in 1916 to mint secondary coins which should be equivalent to the German mark (100 Pfennig = 1 DM). The old currency, the ruble, was removed in 1917 by these secondary coins to the exchange rate of 2.16 DM. For the time being only 20-, 10-, 5-and 1-Pfennig - pieces were minted. Nevertheless, in the next year the occupying management was toppled and under these circumstances only the up to now minted Pfennig – coins remained in Poland until these were completely substituted in 1923 by own currency.