This vintage 1970s Electro‑Harmonix Big Muff π is fully functional and retains its iconic thick, sustaining fuzz tone that defined countless classic recordings. The enclosure shows honest age from decades of use, and the original box is included, with tape present from being opened and re‑secured over the years. A true period‑correct NYC Big Muff, ideal for collectors and players who want authentic 70s analog character.