1 Zloty large type, large date

Poland's postwar aluminum coinage was produced under the constraints of a centrally planned economy that periodically adjusted coin sizes and die designs with little public announcement. The "large type, large date" designation distinguishes this variety from the reduced-diameter issue that eventually replaced it — a change driven by metal economy directives from the Polish National Bank rather than any aesthetic consideration.

The nearly three-decade production run across 1957–1985 means individual years vary considerably in mintage, with some dates effectively impossible to locate in unworn condition due to heavy vending machine and tram fare circulation.