A rarity from the uncirculated "Polish Cities" series. Designs from 1964-1965 by Andrzej Heidrich, which was one of his first designs commissioned by the National Bank of Poland, who later became the main and only designer of Polish banknotes. All Polish circulating banknotes from 1974 to the present are of one authorship.
A unique design in one of its color versions.
An early version in the "standard" format, adapted to the dimensions of other denominations - no reduction or enlargement. Printed as they were on paper without watermarks.
Condition of preservation without remarks.