The clavioline is an electronic analog synthesizer. It was invented by French engineer Constant Martin in 1947 in Versailles.
Fig.1 Oscillator and keyboard
Fig.2 Vibrato effect
Fig.3 Filter assembly
Harald Bode was a German engineer and pioneer in the development of electronic musical instruments.
Hohner Multimonica, first released in 1940, designed by Harald Bode
Frequency shifter, model 735 Mark III, designed and manufactured by Bode
Vocoder, model 7702, designed and manufactured by Bode