50 zloty 1940, obverse and reverse subprint only

It is relatively common on the market to see a commercial subprint of only the obverse with a blank reverse (as here https://onebid.pl/pl/banknoty-50-zlotych-1940-41-rewers/2033336 ) on thin paper without watermarks. This is a very rare two-sided subprint. Bank pieces with no fractures. Banknotes of this type, are described either, as from a counterfeiter's workshop due to the poor quality of the paper, or run-out samples, due to the quality of the details. We assume that poor paper quality does not absolutely rule out runaway use, but the high quality and conformity of details, indicate an original runaway attempt.