About ten years ago, I bought a Growler at a fleamarket, I paid three
dollars for the Growler.At the time, I didn't know it was a Growler or
what it was used for.I took it to Flanagan Electric company.A guy at
Flanagan checket it out by moving it around inside of a motor
armature.Flanagan paid me seventy five dollars for my Growler.

I have here something I bought cheap at a Goodwill store, a few years
ago.The device measures about eleven inches long and about two inches in
diameter.It looks sort of like an oversize large plastic crayon.There is
an electric cord on the bottom of the device and also a little knurled
brass knob on the bottom of the device.On the bottom of the device it
says, Master Appliances,Inc Marion, Indiana 20 W 115 V

What is it? What is it used for? How old is it?
cuhulin