VINTAGE VIBRATOR MUSEUM
The Oster Stim-U-Lax for Barbers has a large, strong motor that straps to the back of the user's hand. The forceful vibrations are transmitted into the hand, down through the fingers, and onto the scalp—or other body part. The classic strap-to-hand design spanned nearly half a century and remained unchanged except for small material updates for most of that time.
John Oster Manufacturing Co. (Milwaukee, WI USA)