The Hohner Multimonica (introduced in 1940[1]) featured a combination of a fan-blown reed organ and a monophonic sawtooth wave analog synthesizer.
Produced by the German Hohner GmbH in the 1940s and 1950s, it preceded even the more famous Selmer Clavioline.
Its circuitry was designed by the German engineer Harald Bode.
The Multimonica II featured no microphone input, and only one loudspeaker, but provided more types of harmonics filtering, and the electromechanic vibrato was changed to a tube based and more sophisticated design.
[2] A photo of a third model can be found on the World Wide Web, looking like a simplified version of Multimonica I (without microphone input).