One of those full-featured roundie Zeniths in a huge cabinet is something I'd really like to get. I'm down to just one roundie (From three at one time). But the one I have is rather plain, without any special features.
I'd say your CRT isn't original, because the color of the screen doesn't match the mask. I know Zenith used at least two different paint colors on their masks to match the CRT. (One is kinda green, the other is a blueish-gray).
Doesn't mean much, I'm still jealous!