"Aha, the Minstrel surfaces! Thanks to Jacques Stompboxes for the pictures and descriptive info.
Three whole octaves (WAAAAY, more than the puny 2-1/2 I'd previously been told it had)! Four voices, "Bass Chorus", and Vibrato, plus the built-in amp./speaker that seems so common in organs of this caliber.. I suspect those "drawbars" are just on/off switches, just like on the Tigers." http://www.combo-organ.com