This isn't related to TVs, but I have a couple pieces of old Sony HiFi equipment from the very early 1970's and I'm always amazed by the quality and attention to detail Sony had back then. I feel like it's back when Sony had something to prove. This may have been the case for most consumer electronics manufacturers back then though.
One is a TA-1130 amplifier, and the other is a reel-to-reel tape player (I forget the model). The most amazing to me is that the reel-to-reel still works fine after nearly 50 years, considering all the moving parts.