Farfisa TD/50 Transicord Electric Accordion

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In the early 1960s, the first electronic accordions were developed by Farfisa, a merger of the Scandalli, Settimio Soprani and Frontalini companies. The TD/50 Transicord from 1962 was the first transistor accordion. It sounds more like a combo organ, namely the Compact series, which appeared in 1964. The Transicord was designed together with the Farfisa amplifiers and the F/AR, an external reverb, preamplifier and power supply unit. It was offered in two models, the Standard and the DeLuxe, which featured organ percussion effects.
1960-1962 Farfisa developed the first generation Cordovox vacuum tube accordion, the CG-2 and CG-3, which used tubes in a suitcase-sized tone module to generate sound.

(Source: Wikipedia)

The Transicord TD/50 is an analog accordion with semiconductor circuits that generate and process electrical sound signals through subtractive synthesis. Two versions were produced, one with 77 buttons and one with a 44-key keyboard.
The effects and timbres are: Percussion Slow and Fast, Vibrato 16, 8, 4, Multi-Tone Booster, Reverb, Bass 16, Strings 16, 8, 4, Flute 8, Oboe 8, Trumpet 8, Piccolo 4.