RR-, 50 zloty 1981, Boleslaw the Bold, DESTRUKT - sheet metal marking on the reverse side

A rare destruct - the disc on which the coin was struck was cut from a piece of sheet metal, on which there was an alloy marking. These signatures were placed on the very edges of the sheet metal, and in coin production these fragments should have been treated as waste. The mint employee's oversight resulted in a highly interesting destruct. Highly rare, known few pieces.