Black Plum? Japanese Black Trifele?

Of course, I didn't label it. Of course, I don't remember. 🤦🏻‍♀️

Here's what I know:
-Container-grown
-Stunted development
-Suffered extreme neglect in high temps, during drought
-First fruit ripened, but flesh was still green
-Best tomato I have every tasted.

Anyone? Anyone at all?