He is known as a co-author of all coins produced during the Slovak Republic ( 1939 -- 45 ) .
He co-designed Polish coins as 1 Polish zloty ( 1949 ) , 50 and 20 groszy ( 1949 ) .
He is known as a co-author of all coins produced during the Slovak Republic ( 1939 -- 45 ) and he co-designed Polish coins as 1 Polish zloty ( 1949 ) , 50 and 20 groszy ( 1949 ) .