u/KingD421 found this vintage Keltron, part of a fire alarm system.
KBD.news Published February 8, 2022
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This piece of history, sporting the physical layout of the late '70s, early '80s, was apparently part of a fire alarm system.
Found this in a drawer at work. Not sure how old it is. I guess it's used for an old fire alarm box we have here – KingD421.
The labelling on the case reads:
"Keltron Corporation
Security Systems Division
Waltham, Mass."
Removing the keycaps reveals the Hi-Tek High Profile switches, which – according to Angrymalayman – are the predecessors to Space Invader switches. "A bitch to disassemble and reassemble since it's so fragile."
Based in Waltham, MA, Keltron Corporation is still in business, they are "a leading manufacturer of fire and security alarm monitoring solutions that enable organizations and companies to provide dependable, scalable, life safety event response services" – since 1967.
I reached out to them and will update this post if I get any feedback.