Electro-Harmonix Big Muff Pi V3

Replaced knobs, but otherwise all original. In great condition, works perfectly. Comes with original box. 

As with the V1 and V2 Big Muffs, the bass, treble, gain, and fuzziness of the tone varies slightly from unit to unit due to varying component type and values used in day to day production, though V3 Muffs are much more consistent than previous versions. The V3 tones were similar to the later V2 tones, since they were essentially the same pedal with a graphics change.