No text, but a visual code

[Antonio García Jiménez]

You are right  DONJCH. Although at each point of the star there are three lines, in the tube there are groups with more. The most common thing in the Middle Ages was to indicate all the degrees of the sphere, as we see in this volvelle from wikipedia.

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The grouping of three in three strokes that we see repeated in various parts of the VM imagery makes me suspect lines with a value of 5º to represent one hour.

The big question is: are those lines the glyph that looks like the letter i that we see in the VM script? 

To answer this, the first thing is to ask: why is the glyph of the script not a vertical line but is inclined as if it were inscribed in a sphere?