I tasted some Noire de Crimée tomatoes with BER, on 3 Aug 2019. They were good, but the taste was a lot milder and more normal than I would have expected from what others say about it and Black Krim. Maybe the shade from the neighboring plants lesseed the flavor.
There are ripe ones without BER.
Fruit size is about that of Matina and Moravsky Div. Edit: Because they were golfball-sized and round instead of large beefsteaks; they were probably a cross.
I prefer the stronger, smokier taste of the Paul Robeson tomato.