Substitution for germanium transistor

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:

It was my very own design; I still have the circuit value calculations!

Mike.