it was the last Synthesizer (with rudimentary midi implementation) by Fender RHODES (CBS before and ARP before that) and for it’s ARP
history it is still sounding ARPish. Resonance has 7 Steps, but anyway it is not a bad synth..
and here’s n.other nice Chroma Site..
Note: Added some more Images to the SynthDatabase.. (cs60, arp avatar board,Mirage, etc..)