This CMOS circuit for LED displays is from a Radio Electronics magazine from February 1989. The circuit has an enable pulse for storing the value shown on the display.
This is an old test circuit for integrated TTL counters, feeding a Nixie tube, common at the time....
This old oscillator using germanium transistors has a high impedance headphone as inductor to...
This preamp with several inputs using germanium transistors from the time was found in Japanese...