Kee-Bass Combo Organ Bass Synthesizer

via this auction
"1967 Rheem Kee-Bass Combo Organ String Bass Synthesizer. The Kee Bass is monophonic keyboard with high-note priority. The Sustain/Percuss tab functions like this: Switched to "Sustain", it plays like a regular organ - press a key and it sounds continuously until you release it. Switched to "Percuss", it plays like a piano. Press and hold a key, and the sound dies out; how fast depends on the setting of the Decay Slow/Fast tab. The Bass Booster, Mellow/Bright and Fuzz tabs do what you'd expect. Controls:

"Star Trek Transporter-style" Bass Booster lever.

Tabs: Tone Mellow/Bright, Fuzz Off/On, Mode Sustain/Percuss, Decay Slow/Fast, Power Off/On.

For more information than you could possibly want, check out:
http://www.combo-organ.com/Rheem/index.htm"