Absence of the Symbol Resembling '4' in the Very First Folio 1r

[Dobri]

@Dobri
About your castle with the battlements.
You yourself provide the link, but why don't you look at the photos?
This castle had no dovetail battlements.
It's the little things that say as much as the big ones.
None before 1930.
Emperor's castle-old photo - Castello dell'Imperatore – Wikipedia

The battlements seem to have both
- Ghibelline (dovetail, see the attached segment from a XVII century painting); and
- Guelph (loophole, in every second merlon) features.

It is a mixed architecture. Note that every second merlon without a Guelph loophole would be useless if there is no Ghibelline dovetail on top provided for crossbows.

It can be assumed that the dovetail features of the unfinished castle became less prominent over the centuries due to disrepair and Guelph influence.