Fake designs made to the detriment of collectors have the series designations I Serija BB, I Serija BF, and I Serija BH.
Fold of the upper left corner, crease at the right corner
Cz. Miłczak "Banknotes Polskie i Wzory tom I i II", publisher NUMIS POLAND edition II 2023,
op. Cit. -Volume I, Item 28, p. 257.







