"This is a somewhat rare Crumar all analog polyphonic synth from around 1983. It features 49 keys, 6 voices, 2 oscillators, and supposedly uses the same chips as some other desirable poly synths from the era.
You can read more about the Stratus at synthmuseum.com and listen to some demo sounds via keyboardmuseum.com. The demo is very faithful to the kinds of tones you can dial in with the stratus."