Dynamic Demonstrator made by Radio Corporation of America Camden N.J.
Have not used it for awhile, got the cool magic eye
Manufacture Date?
http://dmbshare.org/pictures/20070820/1.jpg

I'd give that a cool factor of ten, and it wouldn't suprise me a bit that you would have one of these!.. I can't read anythiing on the board to ascertain what this thing does, but I like it! please explain further, my man

Looks to me like a school demo board of yer basic All-American Five superhetrodyne radio.

Some thing different for the viewing
http://dmbshare.org/pictures/20070821/1.jpg