Dude, I got you. LOLThere was also Utah, CTS was also still supplying the square magnet and odd ohmage 4, 32ohm stuff although mostly for SS or non guitar amps. You could still option JBLs in the Rivera era, I've seen a Concert with the grey speaker and badge. And of course the Rivera era 6V6 amps like the Superchamp you could get the EV 10M.
It's true though the 'standard' would have mostly have been Eminence.
Again, I'm just talking the standard Eminence ( 67 code) blue labeled speakers.
I have 5-6 80s Fenders ( all Rivera era ) with these speakers.
Appreciate your response anyhow.