Vintage but functional, an obsolete, discredited, out of fashion, hand held quack electrical apparatus manufactured by Master Appliances, Inc. of Marion Indiana.
An image of the device (which works very well) while powered is to follow.
Plugs into standard 110 socket, and by adjusting control knob of device, the bulb (which resembles a neon light) becomes brighter and brighter, and at maximum puts off a relatively significant amount of sound (from the tube) and a ghostly but substantial ultraviolet glow.
This device is in excellent cosmetic and functional condition and comes with a single 'bulb' (shown in images) which works perfectly.
Originally the user would have a complete set of various interchangeable attachments, each with varied and diverse 'supposed' uses for which they (good for 'many' complaints) were recommended.
I'm guessing (entirely speculating) the bulb which is included with this apparatus was supposed to stimulate the scalp, or was for use on the sufferers neck... Neither of which is actually recommended as something to actually do with this today.
I believe this company and product line came to end when they were raided by the FDA!