No text, but a visual code

[Antonio García Jiménez]

Hello Linda, the astrolabe you have inserted is anachronistic. It has the Zodiac symbols, an innovation of the second half of the XV century, but that did not exist in the first half when the VMS was made. For me, the lack of Zodiac symbols at that moment is what explains the possible use of numbers as Zodiac signs in the VMS, specfically 8 and 4. 
   I think there are only the numbers 8 and 4 (the latter its Arab shape) in the VMS. The 9-like glyph is not a number. For me is equivalent to (o) and (a), but these glyphs are not letters but stand for degrees and stars on the celestial sphere.