I have been informed that this is the keyboard for the VT52-N. I haven’t been able to find much info on the VT52-N. Anyone knows what the VT52-N was used for?
Thanks! That was interesting information. Apparently DEC Datasystem 3xx was targeting CTS-300. I also read something about Decform used on CTS-300. Probably the VT52-N is for Decform applications.