![Poland. 20 Zlotych 2013, European bison (Bison bonasus), Animals of the World series - Proof Poland. 20 Zlotych 2013, European bison (Bison bonasus), Animals of the World series - Proof](https://sklep.pgnum.pl/83351-large_default/poland-20-zlotych-2013-european-bison-bison-bonasus-animals-of-the-world-series-proof.jpg)
![Poland. 20 Zlotych 2013, European bison (Bison bonasus), Animals of the World series - Proof Poland. 20 Zlotych 2013, European bison (Bison bonasus), Animals of the World series - Proof](https://sklep.pgnum.pl/83351-large_default/poland-20-zlotych-2013-european-bison-bison-bonasus-animals-of-the-world-series-proof.jpg)
Poland. 20 Zlotych 2013, European bison (Bison bonasus), Animals of the World series, by Ewa Tyc-Karpińska, Dobrochna Surajewska, Parchimowicz 1294, KM Y# 879, Fischer: K(20) 069, Silver 38,61 mm, weight 28,28 g. .925 Condition Proof, coin in original NBP blister