This tree does not have any grafts on it.
All updates:

(December 22, 2023) Rodent disaster :'( Sept 29, 2023 -- Some stupid rodent (a rabbit maybe?) has decapitated my beautiful healthy #134. It left ONE sunburned leaf on the sad little stump.
I pruned it back and surrounded both trees with some chicken wire fencing. Will try rooting cuttings of the seedling.