Dewtron
Dewtron were a small British manufacturer of modular synthesizers which were sold to customers in kit form or as built units. It was founded by Brian Baily on 5 February 1964 in Wokingham, Berkshire. By 1970 the company's products included oscillators, voltage controlled amplifiers, sample and hold and envelope shapers.
Mike Rutherford used a Dewtron "Mister Bassman" bass pedal synthesizer on Genesis albums from Nursery Cryme onwards, before replacing it with a Moog Taurus I for the album A Trick of the Tail. Yes' frontman Jon Anderson used a similar unit in live performances. Chris Carter, later to form Throbbing Gristle, experimented with Dewtron kit-based synthesizers early in his music career.
The company later moved to the Ferndown area in Dorset and shipped some synthesizer modules and related products from there before closing.