Premium stereo ID

[3Stgs]

I’m trying to determine if my 86 Bronco has the premium stereo package, without removing the actual stereo… yet. I know the amp is somewhere in the middle of the dash, but are there any external clues that it is the “premium” system?

 

[3Stgs]

Also, it does not have the panel on top of the dash with 4 screws, where an amp would normally go. Maybe that’s my clue that it’s not the Premium…