Austria (Duchy). Vienna, Frederick I "the Handsome" (1308-1330), uniface Silver Pfennig, 0.5g, squirrel facing right. Luschin-132, Koch-217, NF
References;
Alfred Szego, The Coinage of Medieval Austria 1156-1521, a basic outline , privately published, 1970.
Bernard Koch, Der Wiener Pfennig. Ein Kapitel aus der Periode der regionalen Pfennigm ünze , Vienna 1983.
