That is a version of the PB101 Sync VCO with a poti for shaping the waves. In square wave mode one can change the duty cycle and in triagle mode one can change the wave from triangle to ramp.
The PB107 Sync VCO II was designed by Wolfgang Spahn 2017-20.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.