Everybody, except maybe Frigidaire and APEX, marketed a TV it seems. I got a little Westinghouse portable with a sun screen over the picture tube as a high school graduation present and it worked beautifully for decades. Amazing.
In the 50s, a lot of the portables had metal cabinets. It might have been to reduce fire risk because, in the South, TVs, "Blew Up." I could never determine what that phrase meant, but I used to see sets sitting all forlorn in corners and was told the reason they were not being used was that they "Blew Up." I don't know how this was related to the other highly technical term, "Tore Up," as in "It's tore up" or "He tore it up" but these two conditions afflicted lots of mechanical things in the South of the 50s.