What is unique or rare about the VM Zodiac signs?

[aStobbart]

I came across this one, which features some resemblances to the vms zodiac diagrams.

It is from Cecco d'Ascoli's Necromantic Commentary on the Sphere of Sacrobosco.

Hello, this is my first comment here but I had to break the silence after lurking for a while.

I also found that picture while reading about zodiac signs and how they are represented in medieval manuscripts. The fact that Libra is represented as a scale and there is no man or woman holding it intrigued me. The other signs look similar in concept, but obviously the VMS ones are less stylish compared to that german book. In my opinion there are many conceptual similarities.

I am not an expert in this area but maybe this "style" can be isolated to a specific time and region? It is a long shot but could provide a lead to the VMS orign or at least the author's background.