find the rootbeer and lavender color ones and its jackpot....There used to be quite a market for those among collectors in the 70's and 80's, don't know if they are still collectable or not.
I have a few of the ones 2nd from the left somewhere. Found them along a old abandoned railroad bed in SC.I had one of these that went in a hole in a stud. They make good knife sharpeners;
When I was a kid in the 60's I got an Electronic toy kit to make various things. It had an AM radio in it but I had to make and attach a horizontal dipole antenna and a ground. I remember picking up stations pretty far away but I think they put our more watts back then.The first one is gold for a ham radio operation. Great for horizontal dipole antenna.