Hey, I've got one of those in my office!
That's it, there, in front of Paul Allen, next to the Commodore PET. A Heathit H19 terminal.
And mine still works. :)
There's space inside for a Z80 CPU board (in addition to the Z80 that does the "terminal" stuff) which turns it into an H89 CP/M computer. But if it were an H89, there would be a floppy drive above the numeric keypad (to the right of the CRT). So I'm pretty sure that's an H19 terminal.