Peter Rarcliff, here is what he wrote. I hope he is OK with me sharing this here.
The front of the cello is in one-piece, cut right across the whole diameter of the tree, although the cut is not from the middle plank, and some rings are therefore inevitably distorted as they are partly cut on the slab.
I measured the rings on both sides, from the position I was able to see the rings reasonable clearly, up to the purfling on both sides.
Upon graphical comparison of the 2 sides, it is clear that the the inner tree growth is exceptionally erratic, as the ring-patterns on the 2 sides, which should actually be very similar, are showing some significant differences and deviations to each other, and although their data correlate ( as they indeed should!) the level of relationship is exceptionally low for ring patterns from the same tree, albeit at opposite sides of the log.
The ring-growth is therefore very erratic, and in view of the significant differences in the 2 halves, is sadly very unreliable.
I crossdated (tested) the data from the individual ring-series, as well as their mean ( combined data), but no significant relationships were seen neither with published regional references nor with data from other instruments contained in my database.
The cut of the wood is extremely unusual, although I have seen that on a very few occasions, probably only on a dozen instruments out of 14,000 tested! so pretty unusual!! It is also not generally advisable to use wood from the centre of the tree, which is mechanically weaker and softer that the later growth in a position of the belly where a lot of stress and pressure is exerted by the strings.
I hope that helps answer your question.