didn't know that TyTy, despite all online feedback i have been seeing, is at least 20 yrs old and going strong..
must be the advertisements they have been posting, like this one about pakistan mulberries, replete with pizza, and the dramatic fireworks at the end of the movie. https://www.youtube.com/watch?v=8fSvjXqd9ag
anyway, i also gypped myself: here's the 'dwarf everbearing black mulberry' i got from ebay(not from TyTy). I knew it wasn't a black mulberry, but the 6$ price for the intriguing 'curio' was just too hard to resist. It was even potted when i received it in the mail, and that's hard to beat, lol! Like yours, and @thecityman , it's probably just a variant of M alba. Definitely not a dwarf, bolting up 6 feet in just a few months. Tortoises love the leaves and shoots, btw.
below is a close up of a true black mulberry, with chocolate to black colored dormant buds
next are a 'noir de spain' black mulberry(left), and dwarf gerardi M. alba(right), smothered with bermuda grass. On their second year, and each having grown not much more than a few inches. For reference, concrete dumbo's rump is ~1.5 feet high. These two, along with black beauty mulberries(a M. nigra) are the veritable dwarfs of the mulberry family.