50 Zlotys Fryderyk Chopin right, Trial Strike Zn

Trial strikes from the Mennica Polska in the early 1970s were produced internally to test die quality, metal flow, and striking pressure before committing to a final alloy and production run. This zinc example is one of several compositional tests documented for the Chopin 50-złotych type — Fischer and Parchimowicz both catalog distinct variants, suggesting a more methodical approval process than was typical for the period. Zinc was almost certainly eliminated early; its corrosion behavior and poor long-term surface stability made it unsuitable for a prestige circulation issue.