All MS images of swallowtail merlons north of Italy we know of are Weltchronik

[ReneZ]

I remember having seen a manuscript where they had these wooden siege structures (like a wooden wall?), which had swallowtail merlons on it. This was years ago though, and I haven't been able to find it back yet. But I'm sure something along the lines of Bellifortis does have (wooden) swallowtail merlons in it.

I wonder if this would have been one of Voynich's Valturius mss now in Library of Congress.