1918 - Poland - 1 Pfennig - FF
German Regency (Kingdom of Poland)
Stuttgart Mint
PL POL Poland 1 Fenig
1939 - Canada - $1 - MS62
2021 - 1 Dollar - MS63
2024 A Guide Book of United States Coins - 77th Edition
A Charlton Standard Catalogue for Canadian Coins - 76th Edition