20 Zlotych Memorial Hospital Center, Trial Strike

Trial strikes from the NBP's commemorative program of the late 1970s were produced in small quantities to test designs and compositions before final approval — many never advanced to circulation issues, and some exist in only a handful of confirmed examples. This particular piece, tied to a hospital center commemoration, falls within a period when Polish state institutions were routinely celebrated through numismatic issues as part of official cultural policy under the PZPR government. The copper-nickel trial designation here, cross-referenced across three catalog systems, suggests it competed against at least one alternative — Fischer's P151b suffix implies a parallel variant exists.