My much cheaper knock around Vinci fiddle has a two piece back though they don't look book matched at all. I'm finding that whether the back is one or two piece seems to not be that important. One isn't necessarily "better" than the other since the back is more of a reflective plate than a vibrational plate like the belly. Nor does one seem to be pricer than the other.
A slab cut back is plain without figure whereas quarter sawn will have figure as with your violin.
Beautiful old violins and bows at trade prices!
Thanks Brian. I actually learned not long after posting this that it is quarter sawn.