Shin-Ei FY-2 Fuzz Box

There appears to be two versions of the FY-2, with quite different circuits.

I believe I've only encountered the version that is similar to the Fuzzrite, a 2 stage blend type of fuzz. It appears there is also a version that is like the 2 transistor English fuzz, but with variable Q1 shunt dc feedback as deployed as the "fuzz" control.