This Full Power Vibra-King Actavator Model FP was manufactured in the 1950s by Vibra-King Co. of Oakland, CA & marketed as a face & body massager for circulation stimulation and healthier, glowing skin. It is made of Bakelite & originally came with four attachments. The cord is frayed on this particular piece, and only one attachment remains, but it is in working order.
Here’s an image of the original manual —>>>
And here’s a link to a PDF with a pic of the Vibra-King & more —>>> http://antiquevibratormuseum.com/AVMPress.pdf