Basically no information available. Everything would be based on the original mother tree or a top worked tree. No observations on charcteristics when grafted onto nursery rootstock.
It is a late season but does not appear to be super late. Its a Keitt seedling crossed with a Gary. Does seem to have decent production on mother tree, fruit looks clean and quality is top tier. If you want something in the "very late" category, i dont know if this would qualify. Until i see further observations, your chouces would be Keitt, Honey Kiss, Beverly, Venus and Neelam.