Considered by most to be the holy grail of compressor pedals, and what many modern compressor makers try to emulate, you're looking at and potentially the new owner of this sweet vintage early 1970's MXR Script Logo Dyna Comp compressor pedal. Works like a champ with no scratchy pots or other issues. Photos inside and out pretty much tell it like it is, but if there is anything in more specific detail that you would like to see I would be more than happy to provide. $249
Hi Marcus, Yes, I *think* so, but I can't be for certain. The gentleman that I wound up getting this pedal and several others had passed away, so I wasn't able to inquire. I did wind up getting a number of older MXR pedals of which were his, and all of them had the same hole. That being said, they sounded and functioned just fine, but the hole was before my time.