Guitorgan

[2] On this type of instruments, each guitar fret is separated into six segments, creating independent contact switches for each string.

According to the book Classic Keys (2019), Vox Guitar Organ was developed at latest in 1965 and released in 1966 by the Jennings Musical Industries Ltd (JMI) in the UK.

[1] In 1965, its sample was given to The Beatles, and Thomas Walter Jennings, a founder of JMI/Vox, said "We hope that with in a few months, they're going to be spreading it all over the world" in a television interview.

[1] According to the Billboard magazine, similar instrument named GuitOrgan seems introduced circa August 1967 by Murrell Electronics in Waco, Texas.

[citation needed] The Guitorgan converts a standard electric guitar through the addition of electronic organ components.

The most critical part of making a Guitorgan is to separate each guitar fret into six segments, creating independent contact switches for each string.