We found this circuit in a magazine 73 from the 90's. It is a circuit indicated for radio-amateur transmitters with the frequencies determined by the sets of coils.
This modern regenerative receiver was featured in the March 1994 issue of Electronics Now...
As part of a larger project, we found this modulation meter in the August 1994 Electronics Now...
This small receiver for the medium wave range was found in Radio Electronics magazine from July...