Question on origin of Eva's Purple Ball

[zeroma]

I am wondering what the ral history of Eva's Purple Ball is? I first heard of it in an older issue of Organic Gardening as being the winner of most productive tomato in whatever class it was listed.

Other than that bit,
who grows it,
how does it do for you,
what zone are you in
any problems with it
how do you use it, slicer, canning?

I'm planning to grow it next year and really curious about it.

Thanks,

Zeroma