This was the EXACT set that my parents bought new in 1984! Our living room GE console with VIR that my dad bought in '77, bought the farm in Feb of 84, and we ended up downsizing to this exact set.
It was a decent performer until the flyback went in '90. They gave it to me, and I had a flyback installed at a local shop. It worked fine for a couple years, then it had this super loud high pitched squeal coming from the speaker, which would sometimes go away. Not knowing how to repair them at the time, it went to the curb.
I remember the salesman telling us that the only change for Zenith for 1984 was the color of the LEDs. He said in 1983 they were red, and the '84 models were green. Dunno how accurate that was, but that's what he said