Hammond S6 Chord Organ

The Hammond S6 is an all-electronic tube organ from the early '50's to the late '60s.  It used buttons on the left side (similar to an accordion) to produce full chords in addition to the notes played on the keyboard.  The S6 is an interesting organ for two reasons; the volume control is a lever under the keybed that you control with your knee as you play, and the solo voices are an incarnation of the Hammond Solovox.  What I've found cool about the S6 is that if you layer some organ sound with one of the solo voices and play it monophonic, it resembles the sound of a two-oscillator mono synth :)