1 Zloty oak leaves, Trial Strike without próba Ni

The oak-leaf złoty design of 1928 was part of Poland's broader interwar coinage reform as the newly reconstituted state worked to stabilize the złoty following its introduction in 1924. Trial strikes — próba pieces — from the Warsaw Mint were produced in various metals to test dies and establish production parameters, but this particular nickel strike lacks the "PRÓBA" counterstamp that officially designates pattern status, placing it in an ambiguous category that collectors and cataloguers have long debated. Whether omitted deliberately or by oversight during die trials is unresolved.