Talk about an obscure analog sequencer! It deserves to be better-known.
Deviant Synth
Analogue Heaven is poison. We are the antidote. XD
The ANS - a forgotten pioneering Russian synthesizer.
Theremin was not the only Russian to pioneer electronic music equipment.
There was Evgeny Murzin’s ANS, a giant synthesizer that used photocells to read scratches from rotating glass disks to make music. Somewhat like the Optigan organ, but far more complex. And dating from 1937.
Read about it here, here and here. Yes, Matrix ran it.
Coil used ANS sounds on an album in 2004.