15thc perception on swallowtail merlons?

[Koen G]

But this does not explain the German text and the crowns, which are most likely to be attributed to the Habsburgs.

You mean in the VM? I wouldn't go as far as to say that the inclusion of swallowtail merlons must mean it was made in Italy and/or by Italians. But of course knowing where swallowtail merlons were drawn is important knowledge to take into consideration along with other indicators.