This flip-flop with neon lamps was found in a 1969 publication that deals precisely with neon lamps. Observe the high supply voltage.
This circuit appears in several configurations in this site. This is from American documentation from...
The instrument of this field strength meter, from a 1970s publication, can be a 200 uA...
August 2017 - Mouser Electronics is making available the Gen III generation of Vishay P Channel...