Okay, so I mentioned DECwriter and I have a bit so let's elaborate so you all can bask in the awesomeness of CommunistWitchDr's find.
This is a DECwriter.
Specifically this keyboard is from a DECwriter - I'm pretty sure it's an LA36. You may have also noticed that the keyboard appears to be missing the number pad - it's not. That's a separate part assembly. The Berg connector at top is semi-proprietary Digital, which is why it's stamped uniquely - it connected to the control board via rainbow cable or ribbon cable.
Those cluster of keys on the left are the printer controls, with some also on the right. (Specifically Line Feed and Repeat.) Line Loc is used to indicate current line location. FDX/HDX is to switch between Full Duplex and Half Duplex modes. 110 and 300 are the baud rates. Alt Char Set and Char Set Lock set the printing character set. Auto LF is Automatic Line Feed. Here Is, I honestly don't remember how to use. Yes, I've actually had to work on a DECwriter III - it was hooked up to a VAX.
Here's some pictures to give you an idea of the internals. The DECwriter served as both printer and
console. Yes, as in the terminal.
Here's a video of one in action. The operator would enter commands (with feedback from the printer, but you still wanted to be VERY careful) and the computer would write to the printer for output. What's got me scratching my head though is that the LA36 did not come in bidirectional from what I've found (HDX/FDX means it's bidi.) The change from toggle switches to pushbutton mid-flight would not surprise me at all. Especially since the LA34 (just a printer, not a console) used a keyboard-style push button set identical to these.