Here is a coin whose reverse is illustrated in the most famous numismatic book - in Tadeusz Kalkowski's "A Thousand Years of Polish Coins" (on page 105).
A rare counterfeit of a ternar of Ladislaus Jagiello from the Lutsk forgery treasury (1944).
Ex. Tadeusz Kalkowski (with envelope included).
Bleached copper, diameter 14.5 mm, weight 0.49 g.