Apparently, this is exactly the same circuit that can be found inside Apollo Fuzz and Crestwood Fuzz boxes...
The circuit uses "positive ground" with PNP Ge transistors. Mind the power supply or use a charge pump.
Now verified. Different transistor models/individuals will affect the output level, so it's recommended to use sockets to find out the perfect set. Or you could tweak the board and replace collector resistors with trimmers.
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