medieval references to roundels

[Davidsch]

Following some interesting stuff mentioned in relation to Diebold Lauber , 
I just randomly browsed  the Pal Lat 1370 and was wondering how the scribe makes a reference in the text towards the roundels?

Since there is only a small page number, on the right top,  I assume that was written later.

take for example 

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If he writes something about the the zodiacs and calculations in relation to the tables and astrological explanation, how would the scribe make a reference to the appropriate drawing?

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added: a fun fact in Hongarian one would write for Page 53 -> 53 oldal