Their 'serpent' reminded me (the upper portion of both pieces) of a (lunar, not solar) analemna, in some respects, though that would at the very least require that there be two or more sets of data represented, instead of one.
I imagine that also would be one of the first things ruled out by the pros. ;-)
69 holes, and the enlargement is (ahem) enhanced with those black lines. Some prehistoric kid with OCD, or some stone-age stud keeping track of his conquests. :’)