Destrukt - SAMPLE anomaly, in communist minting, pieces struck centrally on a thin disc were considered destrukt by some scholars, nowadays opinions are divided and more and more often they are considered trial anomalies - first impressions during machine calibration. A beautiful piece, strong luster. Coin not listed in Janusz Parchimowicz's catalog Polish Proof Coins 1949-1990, however, an analogous piece for a 5 zloty coin with a fisherman is listed under P 230.d. Weight 1.43 grams(circulating pieces - 2.7g) thickness 1.23mm (circulating pieces - 2mm). Great rarity - the ONLY known piece!