Hammond Model BV

This Hammond model was introduced in 1946 after the model B and BC had been around since 1937.  The model BV had an additional feature and that was Vibrato & Chorus.  There was a knob on the upper left corner which enabled the Vibrato and set the degree of it.  A toggle switch located on the wooden rail to the left of the upper manual selected the effect. The switch position determined which effect was to be used, Vibrato or Chorus

                                  Below is a picture of the BV preamp and generator