RRR-, 10 zlotych, 1982, Prus HYBRID 1982/1977

A newly discovered hybrid, first described in Marek Krzewiński’s catalog *Circulating Coins of the People’s Republic of Poland 1949–1990*, featuring the obverse of K.172.A and the reverse of K.169.A featuring a bent eyeglass frame.
A rarity which the author of the catalog himself described as a "unique hybrid variety."
A piece of this variety was sold at the Numimarket auction 18/681 https://onebid.pl/pl/monety-prl-10-zlotych-1982-boleslaw-prus-pierwszy-raz-na-onebid/3418821 for 1,800 PLN.