Glen Campbell Forums

The Fender Duo Sonic was seen as a student model guitar, an inexpensive model aimed at amateur musicians. It was referred to as a "3/4 size" Fender guitar.

The original "Duo-Sonic" features two single-coil pickups and a vertical switch on the lower horn of the body to select bridge, neck or both pickups in a humbucking style configuration (as opposed to the blade switch more common on Fender guitars). The Duo-Sonic features typical Fender construction techniques with a bolt-on maple neck, attached to a solid body. The bridge is fixed and the line has a shorter scale neck than standard models as a concession to younger, beginner guitarists and other players with smaller hands.

This picture looks like a late 50's picture of Glen. The first Duo-Sonic was released in 56.