This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
For reference only, this is the second IF amplifier stage of a common transistor radio from the...
The L3 coil is what basically determines the resonant frequency, around 1 MHz, in this oscillator found...
This is one of many twin-T oscillator configurations that can be found in this section and on this...