It was during the 1960s when the original model first appeared. Its origin is so uncertain that even the people who were involved at that time are not sure of the circumstances through which this model went out into the world. What is clear is that in 1969, a legendary guitarist used it in a historic performance, drawing the attention of guitarists all around the world. Now for more than half a century, it has reigned as a great effect unit. This enigmatic classic in the history of effect devices has been reborn under the ideal conditions of the supervision of the original developer. As on the original model, it provides a switch for selecting either vibrato or chorus, and INTENSITY and SPEED knobs for producing that distinctive effect. The buffer circuit that has such an important impact on the sonic character has been also been newly redesigned by the original designer for the 21st century. And a great bonus: a dedicated expression pedal is also included.