This object was part of the equipment incorporated in Tristram Cary's studios established in London in the mid-1960s and built (probably in the early 1960s) specifically for the production of electronic music. An early version of this studio was used in the construction of sounds for the Daleks in early episodes of the BBC's ground breaking science fiction series Dr. Who. A photograph of the Fressingfield, Suffolk studio, about 1969, shows it mounted in a side bay of the studio.
When electronic music was first developed studios consisted of packages of test instruments, like the function generators used in Cary's studio, and custom built panels like this selector panel used to connect various devices and tape recorders in the studio. There were at first no audio synthesisers until Robert Moog produced his Moog Modular system in the US about 1965. Cary's special contribution was the musical support and physical design advice he gave his friends Zinovieff and Cockerell that led to the establishment of the Electronic Music Studios company and the development of the VCS3. Between them they produced a cheap, versatile and portable audio synthesiser that could be used in schools and other music courses. Because it was so cheap it took the English popular music scene by storm and was used by many bands from the Beatles to Pink Floyd, King Crimson and soloists like Brian Eno.