This is a bit sketchy in my mind now but my dad was a production analyst first at Westinghouse in Hamilton Ont and then went to work for Fiberglas before I was born up until his retirement. Early on when I was small he did travel off and on to their various plants in Ohio, Texas etc. I recollect one trip he made, would have been early 60's and he was telling me that he'd been to Zenith and also had a tour of their tv factory. I think I'd already mentioned before somewhere that he and my uncle were big Ham radio, Hi-Fi nuts etc. always building something. But the point of the conversation was that he was absolutely aghast when he saw tv production line workers merrily soldering away circuit boards while eating potato chips and drinking coke etc. Salty fingers a big no no.
I don't think that there was anything Fiberglas related in the TV, stereo biz but they did manufactur the insulation panels for ranges so it is a possibility that he was down there getting the schematics/info for a stove or fridge design production. BTW when they made the insulating panels they used these large almost 5 x 5 ft flat wooden dies with the required shape of the panel sketched in steel cutting ribbon to stamp out the pieces. He used to bring some home, pull out the steel cutting ribbon and use the still good wood for other projects.
Still I can't for the life of me remember anyone having a Zenith washer or fridge