We grew it for many years, but no longer have the tree on our campus (Florida Southern College). The fruit turned fully orange for us, and were shaped like 'Minneola' tangelo -- with a pronounced neck. But much smaller. I don't believe I have a photo.
It's advantage as a rootstock is that it is semi-dwarfing.
It's disadvantages (which are overwhelming, and so no one uses it) are extreme susceptibility to tristeza, exocortis, and cachexia.