Schematics / Model 144 Dual Square Wave Oscillator
Model 144 Dual Square Wave Oscillator by Buchla from the 100 Series ,from the Buchla historical site http://www.buchla.com/historical/b100/144-squareosc.html described short as :
Two independent oscillators in one unit. Frequencies are continuously variable from 5 cps to 20 kc and may be controlled internally or with externally applied voltages. There is provision for wide band amplitude and frequency modulation.