Gosh they don't look like mine!

Mine are long trusses of cherry sized sweet tomatoes,
in the next grobag I have sweet100, these are slightly smaller than GD but even sweeter,

There is a bigger stripey variety called Tigerella?....

Go to www.pinterest.com/tomatodirt/striped-tomatoes/

Look at them see the one that matches yours and you may get an answer - Other than that - If they taste OK then just eat them save the seeds and plant some more next year

I'm wondering who's seeds they were?.....

I got them from T&M. Never had any problems with them. I get all my seeds from them.

I would email them a photo......not complaining just pointing it out, if no one tells them how will they know
I sent a photo once of flowering plug plants, they should have been pink and white.....they flowered red and orange!
they seemed pleased to know

Thanks Pamg I did think about doing that. I have eaten the tomato today and it does taste very nice.

You could save some seeds like Triffid said,depends if they are F1 or not if they grow true......