Not really sure on the switches, but I'm pretty sure it's Keytronic foam and foil.
Allen Bradley 1784:
http://www.ebay.com/itm/121276074572
Cherry MX Clears with missing caps
Chyron Maxine:
http://www.ebay.com/itm/151900594498
And another:
http://www.ebay.com/itm/171868956918
I think this may have been posted already but oh well.
Laird Telemedia 3615A:
http://www.ebay.com/itm/272042755858
Model M 122 (probably non-AT):
http://www.ebay.com/itm/301768968918
Not sure about this but looks like it could be mechanical.
Epson Q503A:
http://www.ebay.com/itm/172004389027
Looks like MX Blacks, could be an interesting project if you get it cheap enough.
Tokheim MEMS IV:
http://www.ebay.com/itm/272053150005
Looks like it's probably Keytronic foam and foil.
Quinton:
http://www.ebay.com/itm/262154545791
NMB with speakers, probably dome though.
Concert Master RT915CTW:
http://www.ebay.com/itm/301807503517
Mechanical and has a nice trackball attached to it.
iOne Scorpius 19U:
http://www.ebay.com/itm/391333162510
Another one of those Funuc boards, attached to a CRT.

If someone could enlighten us on the switch, that'd be cool.
Shizuoka CNC:
http://www.ebay.com/itm/151800364482
An old morse code keyboard. Switches unknown.
DGM MKB-2000:
http://www.ebay.com/itm/252152915766
The Contact Systems CS-400C has what appears to be Cherry M5 (image below in case I'm wrong), so I imagine this will be the same.
Contact Systems CS-400C:
http://www.ebay.com/itm/351590383871
Contact Systems CS-400D:
http://www.ebay.com/itm/111837755039
