European Medieval Bracteata? Need Help To ID

Hello, this coin was found in Transylvania, looks like a medieval bracteata, but the metal doesn't seem silver to me, as it should be. It's not magnetic either. I may be wrong, but looks like several people, perhaps with helmets, standing around a central something (altarpiece?). It is 17mm, 0.65grams. I know it is a longshot, but maybe somebody can help me out. On the reverse nothing can be made out. Maybe because it was worn (it has a pierced hole near the edge).