I maybe wrong but looking at the tuner and controls i would say that is late 1970s heading towards the 1980s and could possibly be one of the last consoles Magnavox made.
What makes me say this is i own a Zenith console from 1980, that flashy backlit glass was all the rage then and also the cabinet style says late 1970s.
Anyway can i just say no matter what you have a beautiful console and its worth keeping and using.
I like Magnavox and im jealous of your console
Also it the turntable no longer has 78 rpm which suggests its a later model.