This frequency divider with SUS was found in General Electric's 1967 documentation. Similar configurations can be found elsewhere in this section and on this website.
This fast trigger circuit allows the counting of up to 300 pulses per minute. The circuit is from...
This intercom uses transistors from the 60s. It was found in a Japanese publication at the time....
This circuit is from an old publication from the 90s, but it can be adapted to operate with LEDs....