This is a Big Muff Pi from Electro-Harmonix. It's a chicken-head knob model from the era when they came in wooden boxes. Functionality has been confirmed. Available for immediate purchase; price is not negotiable, and holds are not available. Thank you. Big Muff big muff John Frusciante Red Hot Chili Peppers fuzz distortion electro-harmonix Electro-Harmonix effects pedal distortion Big Muff Pi