Possibly, the person who told me about Quasar owned a TV retail store/repair service and he would only sell and work on US made TVs. Quasar was the only brand he was selling in 1983.
So his remarks definitely referred to the last US brand TV assembly line in the US.
And I don’t know when the Quasar assembly line shut down, only that it was still going in the early 1980s.