This is the 127 SINT.
A square wave generator bundled with a wave multiplier that can be momentarily or permanently activated.
The 127 Sint. fuzz has a distinctive tone and does not use any discrete transistors in the signal path's circuit. To generate the square wave analogically, it uses the 4000 series CMOS chips, invented in the late 60s.
The wave multiplier multiplies the wave generated by another, two or three octaves below. The result is like a ring modulator with a carrier frequency that follows the fundamental frequency of what was played.
This is an original circuit and it is inspired by the sounds of Anne Clark (St. Vincent).
This insanely cool fuzz is very lightly used and ships safely and swiftly in its original box! Give us a shout here at the shop with any questions you have about this pedal!