This nifty pic on Shorpy.com is going to generate a lot of snarky comments along the lines of "ha ha! You call that portable?!" But when I look at it, I'm amazed that they managed to actually cram a television set with a screen that large in a case that small c. 1959.
http://www.shorpy.com/node/20230
That said, the guy really could have manned up and held it with one hand just for the length of the exposure--or at least, without his secretary's help!
Jeff M.
Chicago, IL