Like some other Russian monosynths, the Polyvoks is loosely based on the Minimoog although the sound bears no comparison. All labeling on the synth is in Cyrylic. The internal circuitry is very basic by western standards and the synth certainly has absolutely no finesse - but surprisingly, it can produce some great raw sounds that most other synths are too smooth to easily produce.
Below is a rare picture of production at the Formanta factory showing the mixer console bay.