Big Muff Pi EC3003-A "Frantone Era". These are the ones you want. Sound is full and super grainy. Dialing the Sustain all the way back, you get a real nice growly overdrive/distortion/fuzz thing happening.

No functional issues with this one, though the tone knob is a touch noisy when dialing it in, not when you are playing. Has the battery door. Sounds fantastic. Lots of mojo. Case is sturdy and clean. I've collected these for years and this is one of the cleaner cosmetic conditions I've owned on the EC 3003-A. Tested and works with either power supply or battery - no issues. This pedal cleans up REALLY nice with single coils, and sustain for days with my 1970's SG through my 1960's Vibro Champ.

Cosmetically, please evaluate the photos for yourself - it's clean but not without its wear. Bottom has all 4 of the rubber feet. I tried to photograph this well to show the cosmetic condition, but please let me know if you have questions.

Please check out my other listings, as I will be listing more of my Big Muff collection and other studio gear. Fast shipper! Always happy to talk gear.