Maybe, GE shared a bunch of parts among tvs and radios. My little 11" portable has the same tuning knob. The '58 portable I just bought has the gold and clear knobs that were used on a lot of radios in the 50's.

If you look at the picture of the chassis there is a round cutout in the metal frame on the top right. That was where the speaker attached in other more narrow models. They sure designed and engineered them to be flexible.

Plus, a lot of people probably don't know that GE had a lifetime warranty on the circuit boards. Maybe that accounts in part for their reliability.

I really like the blue color on this set. It's going to be one of my favorites.