old
Back in the early 1960s I conducted an undergraduate/apprentice training project to build a quartz clock. I think every transistor was germanium.
To divide the crystal frequency by multiple decades it used locked multivibrators (no digital circuits whatsoever, though my employer made computers). Anyone seen a circuit like this:
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215481&o=OneUp ?
It was my very own design; I still have the circuit value calculations!
Mike.