During the 1960s, Zemaitis made 12-string guitars for notable musicians including Ralph McTell, Spencer Davis, Eric Clapton and Jimi Hendrix.

[6] After starting to build acoustic guitars, Zemaitis began to manufacture electric models, with some prototypes used by George Harrison.

Other musicians that asked Zemaitis for guitars were Marc Bolan, Ron Wood and Ronnie Lane.

Zemaitis took the model from a radio magazine, where he noted that every unit had a metal chassis with the components mounted on it.

In his later years, Zemaitis worked with a variety of influential guitarists like Joe Louis Walker, Christian Martucci, Ashes, Clay Cook and Ken Mochikoshi.