I’m taking a guess this is an octave fuzz of some kind. Let me know if this works and what you think of it 🙂
Update (11.11.2012): Built this one tonight and found, as was reported, that Q3/Q4 were slightly misbiased. I changed R12 from 1K to 2.2K according to another schematic and this solved it. There’s also the option of changing R17 from 10K to 4.7K instead, thanks to Mrlindell for that suggestion.