5 Zlotys Trial Strike Al

Polish trial strikes from the late 1950s occupy an awkward institutional moment: the National Bank of Poland was consolidating its post-Stalinist coinage program, and the mint at Warsaw ran extensive material tests before committing to final compositions. This aluminium trial for the 5 Złoty denomination was part of that evaluation process — aluminium was ultimately rejected in favor of aluminum-bronze for the circulating type. Few examples were preserved outside official mint archives.