Capt'n,
I just looked through my stuff and found the instruction manual I was talking about, so don't bother checking. Bad news is, it shows a rectangular screen (but identical controls and appearance). Also came with a schematic! Yours if you want it.
BTW, My brother-in-law would like to give that big Zenith combo a good home, especially if that would free up more space for your orphan TV rescue shelter.