The Heirloom tomato known as Arkansas Traveler is my favorite. Some sources say it was pre-1900, but there is more evidence that this heirloom was bred by the University of Arkansas in 1968. It is open pollinated and indeterminate. It continues to grow and produce all season.
It is a pink tomato with a thin skin, smooth and round. It is medium size and has a lower acid content than most tomatoes. The skin will crack if you have hot weather and then cool rain. But it is not a deep crack. This heirloom tomato will out perform many others under conditions of heat, humidity, and drought.
It produces after 90 days, which is later than most tomaoes. The fruit averages 6-8 ounces. In our area, I get a fairly high percentage of perfect fruit from this variety. It is a fairly soft tomato and full of wonderful juice. Admitedly, it is not a good shipping tomato, but since I am not raising commercial tomaoes, I can let it ripen on the vine and enjoy it every summer. It is indeterminate so it continues to produce until frost. Like most tomatoes, it will not set fruit when the temperature rise over 95 degrees.