The Radiolek reminds me of a couple of 50's era Dukane 6V6 amps that I bought from a guy a few years ago. He got them and a round crystal EV microphone from an elementary school demolition project, they are 8 ohm, 12 ohm, and 70V output taps, and were used for the classroom public address system; all of 10 watts each. I don't know, but based on similar input topography and chicken heads my gut says the Radiolek was meant for a similar application.
The chassis amp is a total mystery to me, looks like one 6V6 and a couple of vacuum diodes maybe(?), and a honkin' big transformer along with an extremely small tranny, or maybe a choke?