Thanks for the follow-up,
GW. I appreciate it.
If I remember correctly, per a later discussion, the model is in the lobby of the Mason Theater at 127 S. Broadway.
(formerly the Mason Opera House)
Here's a look inside.
....It seems to match up.
losangelestheaters
There's another killer urn.
I'm impressed by this fountain. . . but I can't figure out the light above her head.
...Is it attached to the top of her head?
... 
losangelestheaters
Exterior view from the 1950s.
losangelestheaters
.