Hitachi Massager

The Hitachi Massager was an earlier model of vibrator manufactured for health purposes by Hitachi in the 1960s. It is a predecessor to the Hitachi Magic Wand.

Initial design goals
The design goals of the Hitachi Massager are clearly reflected in its marketing as a healthcare device, and specifically for business use as a device to aid in massages. It's fairly interesting that the vibrator was initially registered with the FDA under the purposes of relieving aches and sore muscles, but was repurposed as a vibrator.

Repurposing
Soon after its release, the Hitachi Massager (and the Hitachi Magic Wand) found much greater usage as vibrators. Their popularity is mostly associated with Betty Dodson, a key sex educator in the sex-positive movement in the late 1960s.