And you think the positive feedback is where?
It looks (given all the chokes and input loop/variable caps) that it was intended to be an RF amplifier probably in the AM radio band. Since CK722 were audio transistors this circuit was doubtless a fail. Possibly, the input coil might have been a "loopstick" antenna.
The output "coil" may have been headphones if it was intended to be a radio with detection at one of the transistors. But the various chokes seem to say otherwise. In those days usually CK722 "radios" used the base junction of the first transistor as a detector and the rest were simply audio amplifiers. Basically a crystal set with an audio amplifier.