Zenith the Quality goes in before the name goes on; that was the truth.
Back in the golden age of American built electronics, the competition was huge. You had RCA, Zenith, Phil-co, Curtis Mathes, Admiral, Motorola, and hundreds of smaller companies all competing for the American and world customers.
Below is a wonderful ad from Zenith about their Chroma-color color picture tubes.
This beauty below has been going strong since the Moon landings!