Description
From what I have researched I believe it is a Harmony Electromagnetism Belt used for alternative medicine from 1880's to the 1930's.
I am not entirely sure on the exact date this one would have been made; however it does have a plug to plug into a wall which would indicate that the date would be atleast 1920's as this is when they came out with these with a plug version.
The thinner ring propped up in the center of the belt is the tester ring which they would place in the center of the belt with a light bulb attached and tested to make sure it had enough voltage to light it.
