Can someone identify this "white" tomato?

[Hilde]

I went to the farmer's market today, and a lady was selling produce for her brother. She had a lot of tomatoes, and knew nothing about them (didn't seem the least interested, I could tell when I asked questions). In the area marked "heirloom" she had a few brandywines and a mystery "white" tomato that I couldn't resist trying. She did not know the name of the tomato.

I have taken pictures. The tomato was 14.8 oz, or 419 g, was very meaty with almost all fruit flesh and even less seeds than the only brandywine that I have eaten. Very few seeds. (I did save some) The taste was VERY good (although taste is subjective, I loved this tomato).

I have taken picture of the tomato alone, sliced and with my Azoychka, a yellow smaller beefsteak.

Thanks!

Hilde