Eko Minstrel model: 2000 Portable Analog Organ/Synthesizer, February 1969, made in Italy

Link: combo-organ

"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." 

Controls:

• Knobs: On/Off/Command (Volume?), Tone,  BC/AC/RE (?)
• "Drawbars": Mellow, Reed, Brass, Flute, Bass Chorus, Vibrato