what's more, these were made with actual cherry keycaps (as far as I can determine, they are the same) given the age, they can't be GMK and they are so similar in font, shape, thickness as to authentic Cherry, they can't be anything else.
I have two of these, but none with vintage alps switches! When I was poking around looking for one, I made a note of all the brands (and rebrands) I should pay attention to, then pared it down based on font. The 0 is a dead giveaway.
from what I can see, the rest is of similar manufacture to be the same OEM perhaps. Is the PCB a bit thin and odd looking? black soldermask?
I would also like to note the alternate position of the spacebar switch in the middle as well as holes for cherry stabilizers. Both mine have 8 unit spacebars.
I also like how backspace and return are alps z axis compatible. Those switches are familiar to me, though I don't think I've seen a cruciform keycap mount version before! This is likely one of the oldest alps to cherrymx adapter pieces there are.
Altogether an excelleth find. I've always liked these TTY's and I sometimes use mine to print out notes to my roommates. Maybe I'll get a bluetooth handset and explore the wonderful world of teleprinters.
lastly, here's the DT article on the switches. Once you see the ALPS logo stamped into the top of the metal there, it's hard to ignore, even if blurry.
http://deskthority.net/wiki/Alps_low-profile_oval_sliderhere's an excellent macro shot of one by our own mr a500

from
here (see also for more pictures)