Here's my Galapagos Island antifreeze tomato, so far, this year (grown from seeds from
fruits that survived several hard freezes last year without looking phased by it; note that I just mean the fruits—not the plants; the plants died probably soon after the other tomato plants died). I thinned it, today. It's blooming, today (one of the first).

Here's my 5-chamber Galapagos Island tomato (from a fruit with five locules last year, I believe). I thinned it, today, too, and it's blooming, today, too.
Location: SW Idaho, USA
Climate:
BSk
USDA hardiness zone: 6
Elevation: 2,260 feet
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