From the pictures you provided, it looks like you might be the proud owner of a
Beverage Air DD78. You should find a data plate on the inside left or right wall of the unit. This should tell you what you have.
The Superior tag on the front was put there by a restaurant supply company that initially sold it. They do this to most everything they sell.
If the thing works it looks like a smokin' deal. Check to make sure all the fan motors are working, inside & at the condensing unit (compressor). You more than likely would want to replace the beer lines if the thing has been sitting for a while.
Later,
THE ICEMAN
__________________
The liver is evil, it must be punished!
"Without question, the greatest invention in the history of mankind is beer. Oh, I grant you that the wheel was also a fine invention, but the wheel does not go nearly as well with pizza."
-Dave Barry-