My friend picked this up last week at a thrift store in Philly. It looked cool and he got it for practically nothing He could hear something rattling around inside. It looked like a zapper if hooked up and you touched it. It looks to be from the 50's and runs with a D/C input. One connection is to the outside piece and the other is to the inside rod.
He took it apart it looks like the top bolt/connection can be adjusted in & out. The bottom bolt/connection goes 3/4 through with a wood insulator to a hole in the back. Looks like it was made for a plug-in connector. What do you think?
Thanks