15thc perception on swallowtail merlons?

[Koen G]

But regular square merlons existed before and outside of the period of the warring Italian factions. If the rosettes foldout had only the square type, nobody would have talked about Guelph vs Ghibelline because there would be no distinguishing features. There would just be a castle/city with fortified walls and long walls with battlements. So I wonder if you can ever say for certain of a Flemish artist that they draw Guelph merlons, when they just may be drawing fortifications as they know them.

The reverse is true for the marked form of swallowtail merlons.