Schaller Fuzz

For Fuzz Friday I give you a fun little circuit built in West Germany in the late 60s and early 70s–the Schaller Fuzz. It's a silicon Fuzz Face variant and sounds rather good. Originals used BC109B and 239B transistors, but modern equivalents would be BC549B or 550B. It's laid out for onboard pots, but if you feel like using hookup wire, you could probably fit it in a 1590a. Schematic can be found here.

For reference, here's a schematic I drew up based on Peter Ginidis' comments below. Seems the one floating around the web isn't clear on the pot lug numbering.