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[Antonio García Jiménez]

Please, Let's not complicate things. I have used the example of the Prague clock just to say that it has two hands and that one of them was not to indicate minutes, which would be anachronistic, but to indicate the position of the moon.

The same goes for the little astronomical clock on the Rosettes page at the bottom left. The hands inside the sphere form a triangle with the vertices ending in little circles. It is the same figure, a trine or trigone, that we see in f67v2, a folio that shows the planetary aspects that the sun forms with the moon. On this folio there are little heads at the vertices, one from the sun and the other two from the moon. The distance of 120 degrees to either side of the sun.
  
 Why are there only 8 divisions in the clock circle on the Rosettes page, each with three marks? Because it is an astronomical-astrological clock.

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In this medieval Volvelle we see arrows in the same 8 divisions.

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This Volvelle clarifies it. The 8 divisions are the planetary aspects: trine (2), sextile (2), conjuction (1), opposition (1) an square (2)

Why do the divisions have three marks? Because if each mark is 5 degrees, three marks add up to 15 which is the same as one hour. Thus the clock also symbolizes the daily passage of time.