"Modules in the Synthesizer 15 included:
(2) VCOs - (1) 921, (1) 921B, with a 921B driver
(2) 902 VCAs
(1) 904A VCF
(1) 907A fixed filter bank
(1) 910 power supply
(2) 911 ADSR envelope generator
(1) 923 noise/high-pass/low-pass filter
(1) 952 49-note (C-C) duophonic keyboard
(1) 995 attenuators
(1) CP4A control panel with CV/trigger outputs and attenuators"
And the Maestro theremin in the background is really a rare bird! Well, not so rare because there is another right now selling here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300549129831
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