I found the first ever reference I have read that indicates that there is nuclear and nuclear symmetry within the same cell.  This is something i have observed (i believe) and would love to draw attention to.  So here is an article from 1971, readily available online, by one of the oldies of electron microscopy and published back in the hay-day of TEM.  It clearly states that the studies of Phillips and Phillips (1969, in JCB) using cells in culture found a similarity between nucleoli of the same nucleus.

So here is a quick cut and paste from a publication in Micron which shows what I found in HeLa cells, to me (see left, original, and right, areas of bilateral symmetry with lines).  To me this is quite unmistakable.  So will work on this.   My thought is that it will ultimately relate to the N, or the ploidy of the cell.