10 Zlotys Tadeusz Kościuszko, Trial Strike

This is a trial strike produced during the design evaluation phase for what would become the circulating 1959–1966 ten-złoty type. Poland's communist-era mint at Warsaw conducted multiple proof and pattern runs in varying compositions before settling on cupro-nickel for the production issue. Nickel trials like this one were struck in very small numbers — typically fewer than a dozen examples — and distributed among state approving authorities rather than released through any collector channel.

The divergence between ParM#P236b and Fischer's cataloguing reflects genuine uncertainty about exact striking quantities, which were never formally published by the Mennica Warszawska.