State Emblem of People's Republic of Poland - crownless eagle with head turned left and outstretched wings, flanked by year 19-79. Mintmark under talons.
Around POLSKA RZECZPOSPOLITA LUDOWA, below Zl 2000 Zl
Description reverse
Effigy of Nicolaus Copernicus facing 3/4 right. In front PRÓBA
MIKOlAJ KOPERNIK 1473-1543