I grew these for the first time in 2013 and I am growing them again this year, sourced from Tom Wagner Seeds. Savananas, a combination of Ananas Noir and a greenhouse cluster type tomato, I'm unaware of their generation. Cordon variety with varied traits.
I saved seeds from 5 plants, although I think I only have pictures from two plants, they are quite different from each other.
A striped bi oval, orange/yellow.
Smaller red, crunchy flesh and good flavour
Thick walls, keeps well. Sweet, mild and tomatoey nice.
Red Heart shaped (pictured)
And one I saved seeds from but didn't describe for some reason.