I continued the search for anomalies and curiosities on or related to the Holy Crown. Came across a striking and very original remark about the rim's icons.
Here:  >>/26986/ the archangels have a childlike face.
Then here:  >>/26987/ the warrior saints are look like a teenager.
Then comes the row of the healer saints:  >>/26988/ they are young adults with beard.
And at the back of the Crown  >>/26892/ we can find an adult Geobitzas with long beard (the position of his eyes fit into the order of the previous sets of icons).
That Emperor Kon however doesn't fit into this system, looks young and stares straight forward. The researcher who made this observation concludes his icon is a secondary placement (he bases this on several other facts and observations not only on this).