Fortunately Mike Matthews gve me permission to pubish
documents which have the copyright of Electro Harmonix/New Sensor Corp.
Manual of the V1:
Manual of the V2:
Manual of the 1976 Electric Mistress V1
Electro Harmonix cataloge - probably around 1977:
Manual of the Electric Mistress V2
Electro Harmonix cataloge - probably around 1977