via this auction

Electronic Music Labs Inc.
Vernon, Conn. 06066

This was Wally Cirillo’s (Famous Jazz Pianist) first ever synthesizer that he owned.
My Father could make this thing sing like a canary.
Beside his Steinway Concert Grand Piano, this was his baby.
Just a few years before he passed away in 1977 he purchased his Arp 2600 Synthesizer and then this one, got put away and stored until now.
I was going threw some of his stuff that we had put away and found this. I forgot about this synthesizer, I figured his Family (sister) had taken it just like all of the Autographed Albums of my Dad & Joe made. To my surprise it still looks & Plays great! I plugged it in and hooked it up to my Amp and it still worked making those great sounds.
39 years in storage and in a homemade carrying case Wally Built for it. WOW!
There are some issues: the Slides move but with some resistance. (Needs to be cleaned).
There are 3 broken slides that can be repaired, and some Scratches and dings from being used and or stored.
The Keys are as white as the day they were put on. There is on the bottom a Number scratched into it. 524
I’m assuming that this is the serial Number? Not sure, there is no other markings on the synthesizer except for the front panel.
This is a Great Fixer Upper for the Vintage Musical Instrument collector’s out there."