I think that wood came from me. My tree came from Trees of Antiquity in 2016, but I’ve never gotten fruit from it. It has been badly affected by black knot and I may end up removing it after this year.
I passed by yesterday and saw one yellow fruit on it. I’ll take a closer look, but I think it was similar to Mamuang’s pic.
Jefferson has always been the first Euro (?) to bloom for me. I think I remember someone else saying they had the same thing happen for them, so I didn’t worry too much about it. But, maybe it was first because it was really an Asian plum in disguise.
I noted the order here. Also of interest is that Keeper’s Nursery (UK) puts Jefferson’s bloom very early.