Non 3340 oscillators

[TrapaNatans]

The rare fossil (identify this rare synth from a photo of its innards)

This seems to be the VCO of the (unfortunately not-working) Channel 3 lead synth part. I redrew it because the values can’t be read on the original pdf. It looks a lot like the Thomas Henry 555 VCO and fairly simple. I wonder what the upper right part is doing. [Multivox MX-3000 CH3 VCO]