I just received a lot of 3 radios off ebay. A '58 GE AC/battery tube portable model 672 and two transistor portables, which I'll post about in the transistor forum.
I suspect this to be one of the last, if not the last, tube portable AM radio built by GE. Really, it's probably one of the last tube portables built by anyone. I don't think I've seen any that were built after '58.
I tried the radio; but, it only makes a soft hissing sound from the speaker. I was looking at the PC board chassis and noticed it's one of GE's double sided boards that they loved so much and continued to use up until the '80's.