From Serbian Patriarchy in Serbia, XIV century. Warrior Saint called St. Prokopije (I think it's a typical Avar type bow, beautifully represented on the painting)
Serbian Warrior saint, St. Nikita. XIV century. Monastery at Čučale near Skopje, Macedonia. Looks like a version, or the artist's interpretation, of the Magyar bow. Even the quiver is very similar)
Warrior saint Dejan, Veluće, Serbia. End of XIV century. True representation of the crab-leg bow, I think it's purest shape, but you can see the artist's mistake: the string is on the wrong side of the siyah.
Warrior Saint, Monastery of Manasija, Serbia. Beginning of the XV century. Looks like an altered crab-leg bow, with strong stylization but it could be a Turkish infantry bow style,