In fact, this circuit from the 60's applies to photographic printers of the time, timing the lighting of a 20 W lamp. The components are from the period.
This circuit includes a high voltage inverter to power a Geiger tube. We found it in an American...
This circuit generates a signal up to a few megahertz depending only on the LC resonant circuit...
With the CMOS circuit shown, rectangular signals up to a few megahertz can have their frequency divided...