These are Friesacher Pfennige from medieval Austria and the surrounding regions. I did a write-up on these a while ago, which you can find here. I recognize two of your coins (see below). The last one should be a Friesacher Pfennig, too, but you would have to look it up in CNA or another catalogue. Ulrich II, Duchy of Carinthia, 1256–1269, pfennig, CNA I, Cb30 (possibly also Ladislaus of Salzburg, Ca43). Eberhard II, Archbishopric of Salzburg, 1200–1246, half-pfennig, CNA I, Ca21a.
